Pearson Edexcel International GCSE (9–1) · PHYSICS · Chapter
Units (Electricity)
87 practice questions
Topics covered
Practice questions
51–60 of 87
Question 51
1 mark · Easy
Answer and check →Which of the following circuits would have the greatest total resistance?
Three circuits showing resistors in series and in parallel. - A.A single 10 Ω resistor in series with a cell
- B.Two 5 Ω resistors in parallel with a cell
- C.Two 5 Ω resistors in series with a cell
- D.A cell with no resistors
Question 52
2 marks · Easy
Answer and see the solution →A buzzer in a circuit is connected to a 6 V battery and the current flowing is 0.5 A. Calculate the resistance of the buzzer. Give your answer with the correct unit.
Question 53
3 marks · Easy
Answer and see the solution →The diagram shows a circuit containing a 9 V battery and two resistors, each of 3 Ω, connected in series.
Series circuit: battery (9 V) and two resistors (each 3 Ω) (a)[1 mark]State the total resistance in the circuit.
(b)[2 marks]Calculate the current flowing through the circuit.
Question 54
2 marks · Easy
Answer and see the solution →Explain why the resistance of a wire increases if its temperature increases.
Question 55
2 marks · Easy
Answer and see the solution →The table shows the current for different voltages across a wire in an experiment:
Voltage / V Current / A 1.0 0.2 2.0 0.4 3.0 0.6 Calculate the resistance of the wire using the data.
Question 56
3 marks · Normal
Answer and see the solution →An electric heater draws a current of 2.5 A when a voltage of 60 V is applied across it.
(a)[1 mark]State the equation that relates voltage, current and resistance.
(b)[2 marks]Calculate the resistance of the heater. Include units.
Question 57
3 marks · Normal
Answer and see the solution →A lamp in a circuit has a resistance of 15 Ω. The potential difference across the lamp is 6.0 V.
Calculate the current passing through the lamp. Show your working and give the unit.
Question 58
2 marks · Normal
Answer and see the solution →Explain why connecting wires in a circuit are normally assumed to have zero resistance.
Question 59
3 marks · Normal
Answer and see the solution →The diagram below shows a circuit with a battery and two resistors connected in series.
Series circuit with two resistors (a)[1 mark]Calculate the total resistance in the circuit.
(b)[2 marks]Calculate the current in the circuit. Show your working.
Question 60
3 marks · Normal
Answer and see the solution →A student measures the voltage and current across a piece of wire in an experiment. The results are shown in the table.
Current and Voltage for a piece of wire Voltage (V) Current (A) 0.0 0.0 0.5 0.12 1.0 0.25 1.5 0.37 2.0 0.50 On graph paper, plot a graph of current (y-axis) against voltage (x-axis). Draw the best-fit straight line and label both axes with units.