Pearson Edexcel International GCSE (9–1) · PHYSICS · Section
ELECTRICAL RESISTANCE
16 practice questions
Practice questions
11–16 of 16
Question 11
2 marks · Normal
Answer and see the solution →Explain why connecting wires in a circuit are normally assumed to have zero resistance.
Question 12
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 13
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.
Question 14
1 mark · Normal
Answer and check →What is the unit of electrical resistance?
- A.Ampere
- B.Ohm
- C.Volt
- D.Watt
Question 15
3 marks · Normal
Answer and see the solution →Describe an experiment you could carry out to investigate how the current in a wire changes as the voltage across it increases. Include the circuit used, what you would measure, and how you would present the results.
Question 16
3 marks · Normal
Answer and see the solution →A piece of wire in a circuit has a current of 0.30 A flowing through it. The resistance of the wire is 18 Ω.
Calculate the voltage across the wire. Give your answer with the correct unit.