Electrical quantities — Paper 2 · IGCSE Physics (9-1) 0972

27 The electromotive force (e.m.f.) of a rechargeable battery is 6.0 V. What does this mean? A 6.0 J is the maximum energy the battery can provide in 1.0 s. B 6.0 J is the total energy the battery can provide before it has to be recharged. C 6.0 J of energy is provided by the battery to drive a charge of 1.0 C around a complete circuit. D 6.0 J of energy is provided by the battery to drive a current of 1.0 A around a complete circuit.

1 marks

Answer: C

This question in 0972/21 May/June 2018

28 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 0972/21 May/June 2018

29 A water heater is connected to a 230 V supply and there is a current of 26 A in the heater. It takes 20 minutes to heat the water to the required temperature. How much energy is supplied by the heater? A 6.0 × 103 J B 1.0 × 104 J C 1.2 × 105 J D 7.2 × 106 J

1 marks

Answer: D

This question in 0972/21 May/June 2018

39 The diagram shows emissions from a source passing into the electric field between two charged plates. + + + + + + + + + + source – – – – – – – – – – What is emitted by this source? A neutrons and γ-rays only B α-particles and β-particles only C α-particles and γ-rays only D β-particles and γ-rays only

1 marks

Answer: C

This question in 0972/21 May/June 2018

28 The diagrams represent two different electric fields. field 1 field 2 A single electron is located in each of the fields. Which row gives the correct direction of the force on the electron and the field in which there is a larger force on it? direction of larger force the force A ↓ field 1 B ↓ field 2 C ↑ field 1 D ↑ field 2

1 marks

Answer: A

This question in 0972/21 Oct/Nov 2018

29 The resistance of a component in a circuit is found using an ammeter and a voltmeter. How are the ammeter and the voltmeter connected? A the voltmeter and ammeter in parallel with the component B the voltmeter and ammeter in series with the component C the voltmeter in parallel with the component and the ammeter in series with the component D the voltmeter in series with the component and the ammeter in parallel with the component

1 marks

Answer: C

This question in 0972/21 Oct/Nov 2018

30 The table gives data for four different electrical devices. Which device develops the greatest power? device voltage current A car headlight 12 V 3.0 A B cooling fan 110 V 0.40 A C electric spark generator 400 kV 0.10 mA D mains lamp 240 V 0.20 A

1 marks

Answer: D

This question in 0972/21 Oct/Nov 2018

31 The circuit diagram shows a fixed resistor R and a thermistor T used in a potential divider circuit. T R VR and VT are the potential differences across R and T respectively. What happens to VR and to VT as the temperature of the thermistor decreases? VR VT A decreases increases B increases decreases C stays the same decreases D stays the same increases

1 marks

Answer: A

This question in 0972/21 Oct/Nov 2018

35 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 0972/21 Oct/Nov 2018

28 A cell has an electromotive force (e.m.f.) of 1.5 V. What does this statement mean? A The cell converts 1.0 J of energy when driving 1.5 C of charge round a complete circuit. B The cell converts 1.5 J of energy when driving 1.0 C of charge round a complete circuit. C The cell converts 1.5 J of energy per second when driving 1.0 C of charge round a complete circuit. D The cell converts 1.5 W of power when driving 1.0 C of charge round a complete circuit.

1 marks

Answer: B

This question in 0972/21 May/June 2019

29 Which two changes to a metal wire both increase resistance? A decreasing its length and increasing its temperature B increasing its length and decreasing its temperature C decreasing its thickness and increasing its temperature D increasing its thickness and decreasing its temperature

1 marks

Answer: C

This question in 0972/21 May/June 2019

28 A cell has an electromotive force (e.m.f.) of 1.5 V. What does this statement mean? A The cell converts 1.0 J of energy when driving 1.5 C of charge round a complete circuit. B The cell converts 1.5 J of energy when driving 1.0 C of charge round a complete circuit. C The cell converts 1.5 J of energy per second when driving 1.0 C of charge round a complete circuit. D The cell converts 1.5 W of power when driving 1.0 C of charge round a complete circuit.

1 marks

Answer: B

This question in 0972/22 May/June 2019

29 A metal wire of length 100 cm and cross-sectional area 0.20 mm2 has a resistance of 8.0 Ω. What is the resistance of a wire of the same metal of length 50 cm and cross-sectional area of 0.40 mm2? A 2.0 Ω B 8.0 Ω C 16 Ω D 32 Ω

1 marks

Answer: A

This question in 0972/22 May/June 2019

28 A circuit contains a cell of electromotive force (e.m.f.) of 2.0 V. The current in the circuit is 2.0 A. How much energy is converted by the cell in 2.0 minutes? A 2.0 J B 4.0 J C 8.0 J D 480 J

1 marks

Answer: D

This question in 0972/21 Oct/Nov 2019

31 A circuit contains a cell of electromotive force (e.m.f.) 2.0 V, three resistors, three ammeters and two voltmeters. One ammeter is labelled P and one voltmeter is labelled Q. The readings on the other two ammeters and on the other voltmeter are shown. 2.0 V 2.0 A A 0.50 A A A V P 0.50 V V Q What is the reading on ammeter P and what is the reading on voltmeter Q? reading on P / A reading on Q / V A 1.5 1.5 B 1.5 2.5 C 2.5 1.5 D 2.5 2.5

1 marks

Answer: A

This question in 0972/21 Oct/Nov 2019

28 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 0972/21 May/June 2020

29 An electric fire is connected to a 240 V supply and transfers energy at a rate of 1.0 kW. How much charge passes through the fire in 1.0 h? A 42 C B 250 C C 1.5 × 104 C D 2.4 × 105 C

1 marks

Answer: C

This question in 0972/21 May/June 2020

36 Cables transmit electrical power from the output of the transformer at a power station to the input of the transformer at a substation. cables output input transformer at transformer at power station substation The power at the output of the transformer at the power station is 400 MW. Which situation delivers the most power to the input of the transformer at the substation? potential difference at power station transformer diameter of cables output / kV A 200 large B 200 small C 400 large D 400 small

1 marks

Answer: C

This question in 0972/21 May/June 2020

28 A cloth is used to rub an uncharged plastic rod. Both the rod and the cloth become charged. Why does the plastic rod become negatively charged and the cloth become positively charged? A The rod gains electrons and the cloth gains positive charges. B The rod gains electrons and the cloth loses electrons. C The rod loses electrons and the cloth gains electrons. D The rod loses electrons and the cloth loses positive charges.

1 marks

Answer: B

This question in 0972/22 May/June 2020

29 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 0972/22 May/June 2020

30 A cell passes a current of 2.0 A in a circuit for 30 s. In this time the cell transfers 120 J of energy. What is the electromotive force (e.m.f.) of the cell? A 0.50 V B 1.5 V C 2.0 V D 8.0 V

1 marks

Answer: C

This question in 0972/22 May/June 2020

36 A beam of electrons is passed through the magnetic field of a magnet. How must the magnet be positioned to deflect the beam in the direction shown? A B e– e– N S direction S of beam direction N of beam C D e– e– S N direction N of beam direction S of beam

1 marks

Answer: B

This question in 0972/22 May/June 2020

40 α-particles, β-particles and γ-rays are emitted by radioactive nuclei when they decay. Which emissions can be deflected by an electric field? A α-particles and β-particles only B β-particles and γ-rays only C γ-rays and α-particles only D α-particles, β-particles and γ-rays

1 marks

Answer: A

This question in 0972/22 May/June 2020

29 A negatively charged plastic rod is brought near to an uncharged metal sphere and held there. What happens when the metal sphere is earthed? A Electrons flow from the metal sphere to earth. B Electrons flow from earth to the metal sphere. C Positive charge flows from the metal sphere to earth. D Positive charge flows from earth to the metal sphere.

1 marks

Answer: A

This question in 0972/21 Oct/Nov 2020

30 Which statement defines the electromotive force (e.m.f.) of a cell? A the current in the cell when 1.0 C of charge flows in 1.0 s B the current supplied by the cell to drive 1.0 C of charge around a complete circuit C the energy supplied by the cell to drive 1.0 C of charge around a complete circuit D the energy supplied by the cell to drive 1.0 A of current around a complete circuit

1 marks

Answer: C

This question in 0972/21 Oct/Nov 2020

39 Two beams of radiation, P and Q, enter an electric field as shown. + + + + + + + + P Q – – – – – – – – Which type of radiations are P and Q? P Q A beta () alpha () B beta () gamma () C gamma () alpha () D gamma () gamma ()

1 marks

Answer: A

This question in 0972/21 Oct/Nov 2020

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 0972/21 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 0972/21 Oct/Nov 2021

29 The graph shows the current–voltage relationship for a circuit component X. current 0 0 voltage What happens to the resistance of X and what happens to the temperature of X as the voltage increases? resistance temperature of X of X A decreases decreases B decreases increases C increases decreases D increases increases

1 marks

Answer: B

This question in 0972/21 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 0972/21 Oct/Nov 2021

35 Which graph represents an alternating current (a.c.)? A B current current 0 0 0 time 0 time C D current current 0 0 0 time 0 time

1 marks

Answer: A

This question in 0972/21 Oct/Nov 2021

29 A plastic rod is brought near to a small plastic sphere suspended from a stand. The sphere is repelled by the rod. Why is this? A The rod and the sphere have like charges. B The rod and the sphere have unlike charges. C The rod is charged and the sphere is uncharged. D The rod is uncharged and the sphere is charged.

1 marks

Answer: A

This question in 0972/21 May/June 2022

30 Which unit is equivalent to a volt (V)? A A /  B J / C C J / s D W / C

1 marks

Answer: B

This question in 0972/21 May/June 2022

31 A resistor converts 360 J of energy when there is a current of 3.0 A in it. The potential difference across the resistor is 6.0 V. For how long is there this current in the resistor? A 0.05 s B 20 s C 180 s D 720 s

1 marks

Answer: B

This question in 0972/21 May/June 2022

36 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 0972/21 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 0972/22 May/June 2022

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

1 marks

Answer: C

This question in 0972/22 May/June 2022

26 The diagram shows a circuit containing a variable resistor connected to a variable power supply. power supply The table shows the currents for different values of the potential difference (p.d.) and the resistance. p.d. / V resistance / Ω current 3.6 12 I1 1.2 12 I2 3.6 6 I3 What is the order of the currents from smallest to largest? A I1 → I2 → I3 B I1 → I3 → I2 C I2 → I1 → I3 D I3 → I1 → I2

1 marks

Answer: C

This question in 0972/21 Oct/Nov 2022

27 Which diagram shows the electric field pattern around a positive charge? A B C D + + + +

1 marks

Answer: A

This question in 0972/21 Oct/Nov 2022

28 A negatively charged plastic rod P is placed above a positively charged plastic rod Q. P – – – – – Q + + + + + What are the directions of the electrostatic forces on rod P and on rod Q? electrostatic force electrostatic force on rod P on rod Q A downwards downwards B downwards upwards C upwards downwards D upwards upwards

1 marks

Answer: B

This question in 0972/21 Oct/Nov 2022

29 A lamp rated 12 V, 2.0 A is switched on for one minute. How much energy is transferred by the lamp? A 6.0 J B 24 J C 360 J D 1440 J

1 marks

Answer: D

This question in 0972/21 Oct/Nov 2022

24 A plastic rod is rubbed with a cloth. plastic rod cloth The rod and the cloth both become charged as electrons move between them. The rod becomes negatively charged. Which diagram shows how the rod becomes negatively charged and shows the final charge on the cloth? A B electron electron – – movement – – – movement – – – – – + + – – + + – – + – – + – ++ + + – ++ + + + + final charge + + final charge on the cloth on the cloth C D electron electron – – – movement – – – movement – – – – – – – – – – – – – – – – – –– – – – –– – – – – final charge – – final charge on the cloth on the cloth

1 marks

Answer: B

This question in 0972/21 May/June 2023

25 A wire has a uniform circular cross-sectional area. Which statement is correct? A The resistance of the wire is directly proportional to its cross-sectional area and inversely proportional to its diameter. B The resistance of the wire is directly proportional to its cross-sectional area and inversely proportional to its length. C The resistance of the wire is directly proportional to its length and inversely proportional to its cross-sectional area. D The resistance of the wire is directly proportional to its length and inversely proportional to its diameter.

1 marks

Answer: C

This question in 0972/21 May/June 2023

26 The diagram shows the current–voltage graph for a metal wire. current 0 0 voltage What can be deduced from the graph? A As voltage increases, the temperature of the wire increases. B As voltage increases, the temperature of the wire decreases. C As voltage increases, the resistance of the wire increases. D As voltage increases, the resistance of the wire remains constant.

1 marks

Answer: D

This question in 0972/21 May/June 2023

27 A battery is connected to a circuit. It is switched on for 1.0 minute. During that time, there is a current of 0.40 A in the circuit and the battery supplies a total of 48 J of energy. Which row gives the charge that passes and the electromotive force (e.m.f.) of the battery? charge that passes e.m.f. of the in 1.0 minute / C battery / V A 0.40 2.0 B 0.40 120 C 24 2.0 D 24 120

1 marks

Answer: C

This question in 0972/21 May/June 2023

28 The circuit diagram shows two identical lamps connected in parallel to a cell. Three ammeters, X, Y and Z, are also connected in the circuit, as shown. X A Y A Z A Which statement about the current in X is correct? A It is equal to the current in Y and to the current in Z. B It is less than either the current in Y or the current in Z. C It is equal to the sum of the current in Y and the current in Z. D It is equal to the difference between the current in Y and the current in Z.

1 marks

Answer: C

This question in 0972/21 May/June 2023

33 How are positive and negative ions formed from atoms? positive ion negative ion A add positive charge to the nucleus add an electron to the atom B add positive charge to the nucleus remove positive charge from the nucleus C remove an electron from the atom add an electron to the atom D remove an electron from the atom remove positive charge from the nucleus 56 26X

1 marks

Answer: C

This question in 0972/21 May/June 2023

24 A plastic rod is rubbed with a dry cloth. The rod becomes positively charged. Why has the rod become positively charged? A It has gained electrons. B It has gained neutrons. C It has lost electrons. D It has lost neutrons.

1 marks

Answer: C

This question in 0972/22 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 0972/22 May/June 2023

26 A piece of metal wire X with a uniform diameter has resistance R. X A second piece of wire Y is made of the same metal and has a uniform diameter. Y has double the cross-sectional area of X and half the length of X. Y What is the resistance of Y? R R A B C R D 4R 4 2

1 marks

Answer: A

This question in 0972/22 May/June 2023

27 An electric fire is connected to a 240 V supply and transfers energy at a rate of 1.0 kW. How much charge passes through the fire in 1.0 h? A 42 C B 250 C C 1.5  104 C D 2.4  105 C

1 marks

Answer: C

This question in 0972/22 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 0972/22 May/June 2023

25 Which statement describes the direction of an electric field at a point? A the direction of the force on a negative charge B the direction of the force on an N pole C the direction of the force on a positive charge D the direction of the force on an S pole

1 marks

Answer: C

This question in 0972/21 Oct/Nov 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 0972/21 Oct/Nov 2023

27 A wire has a resistance of 8.0 . A second wire of the same material has twice the length and twice the cross-sectional area. What is the resistance of the second wire? A 4.0  B 8.0  C 16  D 32 

1 marks

Answer: B

This question in 0972/21 Oct/Nov 2023

28 A plastic rod is rubbed with a cloth. The rod becomes positively charged because of the movement of charged particles. Which row gives the name of these charged particles and the direction in which they move? charged direction of particles movement A electrons from cloth to rod B electrons from rod to cloth C protons from cloth to rod D protons from rod to cloth

1 marks

Answer: B

This question in 0972/21 Oct/Nov 2023

35 -particles, -particles and -rays are emitted by radioactive nuclei when they decay. Which emissions can be deflected by an electric field? A -particles, -particles and -rays B -particles and -particles only C -particles and -rays only D -rays and -particles only

1 marks

Answer: B

This question in 0972/21 Oct/Nov 2023

26 A student determines the resistance of resistor R. She uses a circuit including a voltmeter and an ammeter. Which circuit does she use? A B C D V A V V A R R R R A A V

1 marks

Answer: D

This question in 0972/21 May/June 2024

26 A student draws graphs of an a.c. supply and a d.c. supply. W X 0 0 Y Which row shows the correct labels for W, X and Y? label of W a.c. supply d.c. supply A time X Y B time Y X C voltage X Y D voltage Y X

1 marks

Answer: D

This question in 0972/22 May/June 2024

27 A resistor transfers 100 J of energy when a charge of 10 C flows through it. What is the potential difference across the resistor? A 0.10 V B 10 V C 10 W D 1000 W

1 marks

Answer: B

This question in 0972/22 May/June 2024

28 Wire X and wire Y are made from the same metal. The table gives information about the two wires. length cross-sectional resistance / m area / mm2 /  wire X 1.0 0.40 2.0 wire Y 1.3 0.30 What is the resistance of wire Y? A 0.31  B 0.78  C 2.1  D 3.5 

1 marks

Answer: D

This question in 0972/22 May/June 2024

29 The diagram shows two resistors used as a potential divider. The reading on the voltmeter is 1.8 V. What is the resistance of the resistor R? A 3.0kQ B 3.3kQ C 7.5kQ D 13kQ

1 marks

Answer: C

This question in 0972/22 May/June 2024

31 The diagram shows a simple a.c. generator. The magnet rotates around a fixed coil wound round a fixed iron core. The electromotive force (e.m.f.) output is a sine wave, a series of crests, zeros and troughs. The magnet is shown in three positions, P, Q and R, during its rotation. The magnetic field in the coil is zero at Q but changing most rapidly. position P position Q position R magnet N S S N fixed coil Which statement about the induced e.m.f. in the coil is correct? A The magnitude of the e.m.f. at position Q is larger than that at position P. B The magnitude of the e.m.f. at position Q is zero. C The magnitude of the e.m.f. at position Q is smaller than at position R, but not zero. D The magnitude of the e.m.f. at position R is larger than at position P.

1 marks

Answer: A

This question in 0972/22 May/June 2024

25 There is a current of 0.60 A in a closed circuit. How much charge passes a point in the circuit in 2.5 min? A 0.24 C B 1.5 C C 90 C D 5400 C

1 marks

Answer: C

This question in 0972/21 Oct/Nov 2024

26 Which two physical quantities have the unit J / C? A charge and energy B charge and potential difference (p.d.) C electromotive force (e.m.f.) and p.d. D e.m.f. and charge

1 marks

Answer: C

This question in 0972/21 Oct/Nov 2024

27 A copper wire is placed in an electrical circuit and its resistance is measured. The wire is then replaced with a second copper wire with twice the length and a quarter of the diameter. What is the ratio of the resistance for the two wires? A 1 : 2 B 1 : 4 C 1 : 8 D 1 : 32

1 marks

Answer: D

This question in 0972/21 Oct/Nov 2024

25 Which row describes an electric field and its direction? description of electric field direction of electric field A region in which an electric direction of the force charge experiences a force on a positive charge B region in which an electric direction of the force charge experiences a force on a negative charge C region in which an electric direction of the force charge produces a current on a positive charge D region in which an electric direction of the force charge produces a current on a negative charge

1 marks

Answer: A

This question in 0972/21 May/June 2025

26 Copper wire is available in fixed lengths but in various diameters d. Each wire has a different resistance R. Which relationship between R and d is correct? A R is directly proportional to d. B R is directly proportional to d 2. C R is inversely proportional to d. D R is inversely proportional to d 2.

1 marks

Answer: D

This question in 0972/21 May/June 2025

27 The diagram shows three 20  resistors, R1, R2 and R3, and a switch S connected to a d.c. power supply. R1 S R3 R2 Switch S is open. The potential difference (p.d.) across R3 is 9.0 V. What is the p.d. across R3 when switch S is closed? A 3.0 V B 6.0 V C 12 V D 27 V

1 marks

Answer: C

This question in 0972/21 May/June 2025

25 A fully charged battery stores a charge of 18 000 C. The battery is charged with a current of 830 mA. How long does it take to fully charge a completely discharged battery? A about 10 minutes B about 3.5 hours C about 4 hours D about 6 hours

1 marks

Answer: D

This question in 0972/21 Oct/Nov 2025

26 What is the definition of electromotive force? A the electrical work done by a source in moving a unit charge around a complete circuit B the electrical work done by a unit charge passing through a component C the mechanical work done by a source in moving a unit charge around a complete circuit D the mechanical work done by a unit charge passing through a component

1 marks

Answer: A

This question in 0972/21 Oct/Nov 2025

27 A cell passes a current of 2.0 A in a circuit for 30 s. In this time, the cell transfers 120 J of energy. What is the electromotive force (e.m.f.) of the cell? A 0.50 V B 1.5 V C 2.0 V D 8.0 V

1 marks

Answer: C

This question in 0972/21 Oct/Nov 2025

28 The diagram shows two resistors in series connected to a power supply. 12.0V S) t+ = — 6.09 R The reading on the voltmeter is 3.0V when the switch is closed. What is the resistance of resistor R? A 0.679 Bo 1.2Q C 1.509 D 2.0Q

1 marks

Answer: D

This question in 0972/21 Oct/Nov 2025