Electric circuits — Paper 1 · IGCSE Physics (9-1) 0972

29 The diagram shows a cell connected to three resistors R1, R2 and R3. position 1 position 4 R1 R2 position 2 position 3 R3 A student connects an ammeter first in position 1, then in position 2, 3 and 4 in turn. In which positions does the ammeter show the current in R1? A 1, 2 and 4 B 1 and 2 only C 3 only D 4 only

1 marks

Answer: A

This question in 0972/11 May/June 2018

31 A student measures the potential difference across a device and the current in the device. Which calculation gives the resistance of the device? A current + potential difference B current ÷ potential difference C potential difference ÷ current D potential difference × current

1 marks

Answer: C

This question in 0972/11 May/June 2018

32 The diagram shows three identical resistors, three ammeters and a battery, connected in a circuit. ammeter 1 A ammeter 2 A A ammeter 3 What is the order of the magnitudes of the readings on the ammeters from smallest to largest? smallest intermediate largest A ammeter 1 ammeter 2 ammeter 3 B ammeter 1 ammeter 3 ammeter 2 C ammeter 2 ammeter 3 ammeter 1 D ammeter 3 ammeter 2 ammeter 1

1 marks

Answer: D

This question in 0972/11 May/June 2018

33 A student sets up this circuit. What is the purpose of the circuit? A to allow a lamp to be made dimmer or brighter as required B to amplify the sound of a voice C to light a lamp in the dark D to sound a bell when the temperature rises

1 marks

Answer: D

This question in 0972/11 May/June 2018

34 The diagram shows two voltmeters P and Q connected to a potential divider. V voltmeter P X V voltmeter Q The sliding connection at point X is moved towards the top of the diagram. What happens to the reading on P and to the reading on Q? reading on P reading on Q A decreases decreases B decreases increases C increases decreases D increases increases

1 marks

Answer: B

This question in 0972/11 May/June 2018

31 A voltmeter and an ammeter are used to measure the resistance of a resistor. Which diagram shows the voltmeter and the ammeter correctly connected? A B C D A V A V A V A V

1 marks

Answer: B

This question in 0972/11 May/June 2019

32 A student sets up four circuits. In which circuit is there a heater in series with a fuse? A B C D

1 marks

Answer: C

This question in 0972/11 May/June 2019

33 The diagram shows a circuit containing a d.c. power supply, a motor and a variable resistor. Three ammeters X, Y and Z show the current in different parts of the circuit. + – X A A Z A M Y The reading on X is 4.0 A. Which statement is correct? A The readings on Y and Z are both less than 4.0 A. B The readings on Y and Z are both equal to 4.0 A. C The readings on Y and Z are both greater than 4.0 A. D The reading on Z is zero.

1 marks

Answer: B

This question in 0972/11 May/June 2019

34 A lamp is to be connected in a circuit so that the potential difference (p.d.) across it can be varied from 0 to 6 V. Which circuit would be most suitable? A B 6 V 6 V C D 6 V 6 V

1 marks

Answer: B

This question in 0972/11 May/June 2019

37 Four small compasses are placed around a solenoid. solenoid A current is now switched on in the solenoid. Which diagram shows possible new directions of the compass needles? A B C D

1 marks

Answer: D

This question in 0972/11 May/June 2019

30 A teacher asks her class “What quantity can be recorded in volts?”. Student 1 says “The potential difference across a resistor”. Student 2 says “The rating of a fuse”. Student 3 says “The electromotive force of a battery”. Which students are correct? A 1 only B 1 and 2 C 1 and 3 D 2 and 3

1 marks

Answer: C

This question in 0972/11 Oct/Nov 2019

31 The circuit shows two lamps connected to a d.c. supply. The same lamps and power supply are arranged in different ways, as shown. P Q R In which circuits will the lamps be the same brightness as in the original circuit? A Q only B P and Q only C P and R only D P, Q and R

1 marks

Answer: D

This question in 0972/11 Oct/Nov 2019

32 Identical resistors are connected together to form arrangements X, Y and Z. X Y Z What is the correct order of the resistances of the arrangements from the largest to the smallest? A X → Y → Z B Y → X → Z C Z → X → Y D Z → Y → X

1 marks

Answer: D

This question in 0972/11 Oct/Nov 2019

33 A student uses 100 cm of resistance wire XY in a circuit to make a potential divider. X sliding contact l V Y He changes the length of wire l by moving the sliding contact along the resistance wire. Which graph shows how the voltmeter reading changes as the length of wire l is increased from zero to 100 cm? A B voltmeter voltmeter reading / V reading / V 0 0 0 100 0 100 l / cm l / cm C D voltmeter voltmeter reading / V reading / V 0 0 0 100 0 100 l / cm l / cm

1 marks

Answer: A

This question in 0972/11 Oct/Nov 2019

34 Where must a fuse be connected in a mains electric circuit? A the earth wire only B the live wire only C the neutral wire only D the live wire and the earth wire

1 marks

Answer: B

This question in 0972/11 Oct/Nov 2019

31 A student uses the circuit shown to determine the resistance of two identical resistors. A V The voltmeter reading is 2.2 V and the ammeter reading is 0.25 A. What is the resistance of each resistor? A 0.275 Ω B 0.55 Ω C 4.4 Ω D 8.8 Ω

1 marks

Answer: C

This question in 0972/11 May/June 2020

32 In the circuit shown, A1 and A2 are ammeters. A1 A2 S Switch S is closed. Which row is correct? the resistance of reading of A1 reading of A2 the whole circuit A decreases stays the same increases B decreases increases increases C increases stays the same stays the same D increases decreases decreases

1 marks

Answer: B

This question in 0972/11 May/June 2020

33 What happens to the resistance of an LDR when the brightness of light falling on it increases? A Its resistance decreases. B Its resistance increases. C Its resistance increases then decreases. D Its resistance stays the same.

1 marks

Answer: A

This question in 0972/11 May/June 2020

34 A student constructs four circuits, each containing a fuse. The fuse blows in one circuit and both lamps in the circuit go out. In which circuit does the fuse blow and both lamps go out? A B C D

1 marks

Answer: D

This question in 0972/11 May/June 2020

35 A transformer has 200 turns on its primary coil and is connected to a 240 V a.c. supply. The output voltage of the transformer is 60 V a.c.. How many turns are on the secondary coil of the transformer? A 20 B 50 C 72 D 800

1 marks

Answer: B

This question in 0972/11 May/June 2020

30 The diagram shows a circuit. The wire between P and Q can be removed and replaced by a circuit component. P Q R S T Where should a voltmeter be connected to measure the potential difference (p.d.) across the lamp? A between P and Q in place of the wire B in parallel with R and S C in parallel with R and T D in parallel with S and T

1 marks

Answer: B

This question in 0972/12 May/June 2020

31 A student uses the circuit shown to determine the resistance of two identical resistors. A V The voltmeter reading is 2.2 V and the ammeter reading is 0.25 A. What is the resistance of each resistor? A 0.275 Ω B 0.55 Ω C 4.4 Ω D 8.8 Ω

1 marks

Answer: C

This question in 0972/12 May/June 2020

32 The circuit shown contains five lamps J, K, L, M and N. All the lamps are glowing. lamp L lamp K lamp J lamp N lamp M One lamp is removed and two other lamps go out. Which lamp is removed? A lamp J B lamp K C lamp L D lamp M

1 marks

Answer: A

This question in 0972/12 May/June 2020

33 The diagram shows a control circuit. The lamp is lit. The temperature of the surroundings increases. What will happen to the brightness of the lamp? A It will be brighter. B It will be less bright. C It will not change. D It will become brighter and then less bright.

1 marks

Answer: A

This question in 0972/12 May/June 2020

34 A student constructs four circuits, each containing a fuse. The fuse blows in one circuit and both lamps in the circuit go out. In which circuit does the fuse blow and both lamps go out? A B C D

1 marks

Answer: D

This question in 0972/12 May/June 2020

31 A student uses four ammeters P, Q, R and S to measure the current in different parts of the circuit shown. P Q A A R A S A Which two ammeters read the largest current? A P and Q B P and R C R and Q D R and S

1 marks

Answer: A

This question in 0972/11 Oct/Nov 2020

32 A circuit X is set up with two identical lamps. Circuit Y is then set up, changing the positions of the meters. X Y A A V V On which meters do the readings change? A both the ammeter and the voltmeter B the ammeter only C the voltmeter only D neither the ammeter nor the voltmeter

1 marks

Answer: D

This question in 0972/11 Oct/Nov 2020

33 An electrical appliance is powered from a mains supply. The appliance normally uses a current of 3 A, but the current briefly rises to 4 A at the instant the appliance is switched on. The cable to the appliance is designed for currents up to 6 A. A fuse is used to protect the circuit. What should be the rating of the fuse? A 1 A B 3 A C 5 A D 13 A

1 marks

Answer: C

This question in 0972/11 Oct/Nov 2020

35 A transformer is needed to convert a supply of 240 V a.c. into 4800 V a.c.. NP NS 240 V a.c. 4800 V a.c. Which pair of coils would be suitable for this transformer? number of turns number of turns on primary coil NP on secondary coil NS A 50 1 000 B 240 48 000 C 480 24 D 2000 100

1 marks

Answer: A

This question in 0972/11 Oct/Nov 2020

9 The diagram shows an electric circuit. When the switch is closed, the lamp is lit. Which row states the type of energy stored in the cell and how this energy is usefully transferred to the lamp? type of energy how this energy is usefully stored in the cell transferred to the lamp A chemical by electric current B chemical by light C electrical by electric current D electrical by light

1 marks

Answer: A

This question in 0972/11 Oct/Nov 2021

26 In which circuit is the ammeter measuring the flow of charge through the lamp? A B C D A A A A

1 marks

Answer: B

This question in 0972/11 Oct/Nov 2021

27 In circuit 1, a negative charge flows in a clockwise direction. The bulb is bright. In circuit 2, the battery is reversed as shown. The bulb is equally bright. circuit 1 circuit 2 Which charge flows in circuit 2 and in which direction? charge direction A negative anticlockwise B negative clockwise C positive anticlockwise D positive clockwise

1 marks

Answer: A

This question in 0972/11 Oct/Nov 2021

28 The diagram shows a circuit containing two resistors of resistance 1.0  and 2.0 . A voltmeter is connected across the 1.0  resistor by connecting P to X. The reading on the voltmeter is 6.0 V. 1.0 Ω X 2.0 Ω Y P V P is moved to point Y in the circuit. What is the new reading on the voltmeter? A 3.0 V B 6.0 V C 12 V D 18 V

1 marks

Answer: D

This question in 0972/11 Oct/Nov 2021

29 The step-down transformer shown reduces mains voltage to 12 V. copper wire soft-iron core mains 12 V voltage When the transformer is used, some energy is transferred to the surroundings. Which type of energy is transferred to the surroundings? A chemical energy B light energy C thermal energy D elastic energy

1 marks

Answer: C

This question in 0972/11 Oct/Nov 2021

30 Which circuit contains a fuse? A B A V C D A

1 marks

Answer: C

This question in 0972/11 Oct/Nov 2021

31 The diagram shows an electric circuit. Which row correctly shows the numbers of different components in the circuit? cells lamps switches A 1 1 4 B 1 4 1 C 3 1 4 D 3 4 1

1 marks

Answer: D

This question in 0972/11 Oct/Nov 2021

32 Two resistors, with resistances R1 and R2, are connected in parallel. The resistance R1 is greater than the resistance R2. R1 R2 What is the resistance of the parallel combination? A less than either R1 or R2 B equal to R1 C equal to R2 D the average of R1 and R2

1 marks

Answer: A

This question in 0972/11 Oct/Nov 2021

36 The current in a small electric heater is 4.0 A. The cable connected to the heater is able to carry currents up to 10 A. Fuses rated 1 A, 3 A, 5 A and 13 A are available. Which fuse should be used? A 1 A B 3 A C 5 A D 13 A

1 marks

Answer: C

This question in 0972/11 Oct/Nov 2021

30 The circuit shown is being used to measure the resistance of resistor Z. Y Z X What is the correct combination of meters to determine the resistance of resistor Z? meter X meter Y A ammeter ammeter B ammeter voltmeter C voltmeter ammeter D voltmeter voltmeter

1 marks

Answer: C

This question in 0972/11 May/June 2022

31 The diagram shows the circuit diagram symbol of an electrical component. Which component does the symbol represent? A light-dependent resistor B relay coil C thermistor D variable resistor

1 marks

Answer: C

This question in 0972/11 May/June 2022

32 What is the advantage of connecting lamps in parallel in a lighting circuit? A A smaller fuse is needed to protect the lamps. B If the filament of one lamp breaks, the remaining lamps stay lit. C The current taken from the supply is less. D The lamps use less power.

1 marks

Answer: B

This question in 0972/11 May/June 2022

33 The diagram shows a circuit of six identical lamps connected to a battery. S Q P T R U Which lamps are brightest? A P only B Q and R only C S, T and U only D P, Q, R, S, T and U are equally bright

1 marks

Answer: A

This question in 0972/11 May/June 2022

34 Why is a fuse used in an electrical circuit? A so that the current can have only one value B to prevent the current becoming too large C to provide a path to earth if a fault occurs D to save electrical energy

1 marks

Answer: B

This question in 0972/11 May/June 2022

35 Which transformer can change a 240 V a.c. input into a 15 V a.c. output? A B 800 turns 40 turns 1000 turns 25 turns C D 2400 turns 15 turns 1200 turns 75 turns

1 marks

Answer: D

This question in 0972/11 May/June 2022

29 Four circuits are set up. In which circuit does the meter measure the potential difference (p.d.) across the resistor? A B C D V A A V

1 marks

Answer: D

This question in 0972/12 May/June 2022

30 A resistor has a potential difference (p.d.) of 12 V across it and a current of 0.60 A in it. What is the resistance of the resistor? A 0.050  B 2.0  C 7.2  D 20 

1 marks

Answer: D

This question in 0972/12 May/June 2022

31 Which circuit is correctly labelled? A B battery cell ammeter galvanometer A light-dependent resistor relay A V ammeter voltmeter C D cell battery heater switch thermistor ammeter fixed resistor A galvanometer

1 marks

Answer: A

This question in 0972/12 May/June 2022

32 The diagram shows an electric circuit. X IX Y IY IX is the current in resistor X. IY is the current in resistor Y. Which statement describes the current from the power supply? A greater than IX and greater than IY B greater than IX and less than IY C less than IX and greater than IY D less than IX and less than IY

1 marks

Answer: A

This question in 0972/12 May/June 2022

33 The diagram shows a battery connected to a potential divider and to two lamps, P and Q. P X Y Q The slider on the potential divider is moved from end X to end Y of the resistor. Which row shows the effect on the brightness of each lamp? brightness of P brightness of Q A brighter brighter B brighter dimmer C unchanged brighter D unchanged dimmer

1 marks

Answer: C

This question in 0972/12 May/June 2022

34 Why is a fuse used in an electrical circuit? A so that the current can have only one value B to prevent the current becoming too large C to provide a path to earth if a fault occurs D to save electrical energy

1 marks

Answer: B

This question in 0972/12 May/June 2022

35 Electrical power is transmitted from power stations to homes using the National Grid. In which part of the National Grid is the voltage highest? B A C D step-up step-down step-down transformer transformer transformer power houses station

1 marks

Answer: B

This question in 0972/12 May/June 2022

26 Four students draw a circuit diagram of the apparatus used to measure the resistance of resistor R. Which circuit is correct? A B V A R R A V C D V A R R A V

1 marks

Answer: D

This question in 0972/11 May/June 2023

27 The battery on a bicycle is connected in parallel to its lamp and bell. The circuit includes two switches, S1 and S2. S1 bell S2 The cyclist closes S1 to light the lamp. She then also closes S2 to sound the bell. What happens to the current in the battery and the power output from the battery when the cyclist closes S2? current in power output the battery from the battery A increases increases B increases stays the same C stays the same increases D stays the same stays the same

1 marks

Answer: A

This question in 0972/11 May/June 2023

28 Which symbol represents an electric heater? A B C D

1 marks

Answer: D

This question in 0972/11 May/June 2023

29 A student connects the circuit shown. 1 bell 2 3 4 Which switches must be closed for the bell to ring without lighting the lamp? A 1 and 2 only B 1 and 3 only C 1, 3 and 4 D 2, 3 and 4

1 marks

Answer: B

This question in 0972/11 May/June 2023

30 A double-insulated electrical appliance must be connected safely to the electricity supply. Which statement is correct? A It must be connected with a fuse and an earth wire. B It can be connected with a fuse only. C It can be connected with an earth wire only. D It does not need a fuse or an earth wire.

1 marks

Answer: B

This question in 0972/11 May/June 2023

31 A simple electric generator induces an electromotive force (e.m.f.). Which modification would increase the induced e.m.f.? A Increase the number of turns in the coil of the generator. B Increase the distance between the magnetic poles. C Reduce the strength of the magnetic field around the coil. D Reverse the direction of the magnetic field.

1 marks

Answer: A

This question in 0972/11 May/June 2023

33 What is an advantage of transmitting electricity at a high voltage? A It is faster. B It is safer. C Less energy is wasted. D Less equipment is needed.

1 marks

Answer: C

This question in 0972/11 May/June 2023

25 Which statement about electric current in a conductor is correct? A In a d.c. circuit, the electric current gradually decreases along the conductor. B In a d.c. circuit, the free electrons flow back and forth. C In an a.c. circuit, the electric current remains exactly the same all the time. D In an a.c. circuit, the flow of charge changes direction continually.

1 marks

Answer: D

This question in 0972/12 May/June 2023

26 Which circuit can be used to measure the resistance of a resistor? A B C D V V V V A A A A

1 marks

Answer: B

This question in 0972/12 May/June 2023

27 A lamp rated 12 V, 2.0 A is switched on for 60 s. How much energy is transferred? A 0.40 J B 10 J C 360 J D 1400 J

1 marks

Answer: D

This question in 0972/12 May/June 2023

28 The circuit diagram shows a battery connected to two resistors. Four labelled ammeters are connected into the circuit. Which ammeter shows the largest reading?

1 marks

Answer: D

This question in 0972/12 May/June 2023

29 Two lamps are connected in parallel. S1 S2 S3 Which switches must be closed so that both lamps light? A S1 and S2 only B S1 and S3 only C S2 and S3 only D S1, S2 and S3

1 marks

Answer: D

This question in 0972/12 May/June 2023

30 Which statement about electrical safety is correct? A If a device is double insulated, it does not need a fuse. B A device that has a normal operating current of 3.0 A must be protected by a 3.0 A fuse. C Switches must always be connected into the live supply wire. D The metal casing of an electrical device must be connected to the neutral wire.

1 marks

Answer: C

This question in 0972/12 May/June 2023

32 In which device is the magnetic effect of a current not used? A electromagnet B loudspeaker C potential divider D relay

1 marks

Answer: C

This question in 0972/12 May/June 2023

33 The diagram represents the transmission of electricity from a power station to homes that are many kilometres away. Two transformers are labelled X and Y. transmission pylon cables pylon cables large houses power ground station X distance Y What type of transformers are X and Y? X Y A step-down transformer step-down transformer B step-down transformer step-up transformer C step-up transformer step-down transformer D step-up transformer step-up transformer

1 marks

Answer: C

This question in 0972/12 May/June 2023

26 Which statement about a voltmeter is correct? A It has a scale which is marked in amperes (A). B It must be connected in series in a circuit. C It measures potential difference (p.d.). D It must have three terminals.

1 marks

Answer: C

This question in 0972/11 Oct/Nov 2023

29 Two 2.0 Ω resistors are connected in parallel. What is the combined resistance of the resistors? A less than 2.0 Ω B exactly 2.0 Ω C more than 2.0 Ω, but less than 4.0 Ω D exactly 4.0 Ω

1 marks

Answer: A

This question in 0972/11 Oct/Nov 2023

30 An electric heater is plugged into the mains supply using a fused plug. The current in the heater is 10 A. The cable attached to the heater is rated at 15 A. The fuses available are rated at 1.0 A, 3.0 A, 5.0 A and 13 A. Which fuse should be used? A 1.0 A B 3.0 A C 5.0 A D 13 A

1 marks

Answer: D

This question in 0972/11 Oct/Nov 2023

33 A transformer in a computer is used to transform the mains voltage of 240 V to 12 V. The number of turns on the secondary coil is 2000. Which statement about the transformer is correct? A It is a step-down transformer and has 100 turns on its primary coil. B It is a step-down transformer and has 40 000 turns on its primary coil. C It is a step-up transformer and has 100 turns on its primary coil. D It is a step-up transformer and has 40 000 turns on its primary coil.

1 marks

Answer: B

This question in 0972/11 Oct/Nov 2023

26 What is an electric current and how is an ammeter positioned in a circuit to measure the current in a resistor? what is an positioning electric current? of an ammeter A a flow of charge in parallel with the resistor B a flow of charge in series with the resistor C a flow of voltage in parallel with the resistor D a flow of voltage in series with the resistor

1 marks

Answer: B

This question in 0972/11 May/June 2024

28 The circuit in the diagram contains four switches, S1, S2, S3 and S4. S1 S2 S4 S3 Which three switches must be closed for the heater to work? A S1, S2 and S3 B S1, S2 and S4 C S1, S3 and S4 D S2, S3 and S4

1 marks

Answer: B

This question in 0972/11 May/June 2024

29 The metal case of an electrical appliance is fitted with an earth connection. What is the purpose of this? A to complete the circuit supplying the appliance so that it works B to ensure that the cables supplying the appliance do not become damp C to prevent the cables supplying the appliance from overheating D to protect a user of the appliance from electric shock

1 marks

Answer: D

This question in 0972/11 May/June 2024

31 A student makes a small d.c. motor. The teacher supplies the following equipment. ● battery ● ammeter ● voltmeter ● coil of wire ● magnets ● resistor The student is also able to use other equipment if he wishes. Which equipment must be used? A ammeter, battery and resistor B ammeter, coil of wire and voltmeter C battery, coil of wire and magnets D magnets, resistor and voltmeter

1 marks

Answer: C

This question in 0972/11 May/June 2024

26 There is a current I in a resistor of resistance R. The potential difference (p.d.) across the resistor is V. Which equation gives the power P dissipated by the resistor? I I A P = IR B P = IV C P = R D P = V

1 marks

Answer: B

This question in 0972/12 May/June 2024

27 A student tests the electrical conduction of four materials. ● aluminium ● iron ● plastic ● silver Which materials are good conductors of electricity? A aluminium, iron and silver B aluminium and silver only C iron, silver and plastic D plastic only

1 marks

Answer: A

This question in 0972/12 May/June 2024

28 This question is about the potential difference (p.d.) across, and the current in, a variable resistor. p.d. current variable resistor The resistance of the variable resistor is increased. Which statement is correct? A The current can remain constant if the p.d. is decreased. B The current can remain constant if the p.d. is increased. C The p.d. can remain constant if the current is kept constant. D The p.d. can remain constant if the current is increased.

1 marks

Answer: B

This question in 0972/12 May/June 2024

29 Diagram 1 shows a resistor connected in a circuit. Diagram 2 shows an identical resistor connected in parallel with the first resistor. diagram 1 diagram 2 What is the combined resistance of the two resistors in diagram 2? A greater than in the circuit of diagram 1 B less than in the circuit of diagram 1, but greater than zero C the same as in the circuit of diagram 1 D zero

1 marks

Answer: B

This question in 0972/12 May/June 2024

30 Where must a fuse be connected in a mains electric circuit? A the earth wire only B the live wire only C the neutral wire only D the live wire and the earth wire

1 marks

Answer: B

This question in 0972/12 May/June 2024

28 What is a thermistor? A a container to keep a hot liquid warm B a circuit to control room temperature C a temperature-dependent resistor D a heater for a room

1 marks

Answer: C

This question in 0972/11 Oct/Nov 2024

29 The diagram shows a circuit containing two identical resistors connected to a battery. The current is measured at X and at Y. X Y Which row is correct? current at Y arrangement compared with of resistors current at X A parallel less than X B parallel equal to X C series less than X D series equal to X

1 marks

Answer: D

This question in 0972/11 Oct/Nov 2024

28 A mains-operated radio is a double-insulated appliance. Which statement is correct? A The radio does not need a neutral connection. B The radio must be earthed. C The radio circuit is safe without a fuse or trip switch. D The outer casing of the radio cannot become live.

1 marks

Answer: D

This question in 0972/11 May/June 2025

31 A teacher makes a circuit using three 1.5 V cells and two 20  resistors connected in series. Which row gives the combined electromotive force (e.m.f.) of the cells and the combined resistance of the resistors? combined combined e.m.f. / V resistance /  A 1.5 10 B 1.5 40 C 4.5 10 D 4.5 40

1 marks

Answer: D

This question in 0972/11 May/June 2025

32 A student investigates the turning effect on a current-carrying coil placed in a magnetic field. The student changes the current in the coil and the number of turns on the coil. Which two changes together must increase the turning effect? A decreasing the current and decreasing the number of turns B decreasing the current and increasing the number of turns C increasing the current and decreasing the number of turns D increasing the current and increasing the number of turns

1 marks

Answer: D

This question in 0972/11 May/June 2025

33 There is a current of 3.0 A in a conductor. The current is changed to 6.0 A in the opposite direction. Which effect does this have on the magnetic field around the conductor? A It decreases and it acts in the opposite direction. B It decreases and it acts in the same direction. C It increases and it acts in the opposite direction. D It increases and it acts in the same direction.

1 marks

Answer: C

This question in 0972/11 May/June 2025

26 Which statement describes what is happening when there is an electric current in a metal wire? A Electrons in the wire vibrate. B Electrons move along the wire. C Positive charges in the wire vibrate. D Positive charges move along the wire.

1 marks

Answer: B

This question in 0972/12 May/June 2025

27 Which two electrical quantities have the same unit? A current and charge B electromotive force (e.m.f.) and potential difference (p.d.) C potential difference (p.d.) and current D resistance and electromotive force (e.m.f.)

1 marks

Answer: B

This question in 0972/12 May/June 2025

28 A 10 V d.c. power supply is connected across a resistor. The current in the resistor is 0.050 A. What is the resistance of the resistor? A 0.0050  B 0.50  C 2.0  D 200 

1 marks

Answer: D

This question in 0972/12 May/June 2025

29 A resistor and a thermistor are connected in a series circuit, as shown. A V What happens to the readings on the ammeter and the voltmeter when the thermistor is heated? ammeter reading voltmeter reading A decreases decreases B decreases increases C increases decreases D increases increases

1 marks

Answer: D

This question in 0972/12 May/June 2025

30 In which circuit does the ammeter read 2.0 A? 6.02 6.02 3.00 3.00

1 marks

Answer: B

This question in 0972/12 May/June 2025

31 A 240 V mains-powered vacuum cleaner has a power output of 2700 W. Which fuse is suitable for use in the plug of the vacuum cleaner? A 3 A B 5 A C 10 A D 13 A

1 marks

Answer: D

This question in 0972/12 May/June 2025

32 The transformer in a laptop power supply is used to change mains voltage from 240 V to 20 V. The transformer has 600 turns on the secondary coil. Which type of transformer is it and how many turns does the transformer have on the primary coil? number of turns transformer type on primary coil A step-down 50 B step-down 7200 C step-up 50 D step-up 7200

1 marks

Answer: B

This question in 0972/12 May/June 2025