Pearson Edexcel International GCSE (9–1) · PHYSICS · Unit
Electricity
249 practice questions
Topics covered
Practice questions
71–80 of 249
Question 71
1 mark · Easy
Answer and see the solution →State what type of force exists between two positively charged objects.
Question 72
2 marks · Normal
Answer and see the solution →State the unit of electric charge and explain what it measures.
Question 73
4 marks · Normal
Answer and see the solution →(a)[2 marks]A current of 0.25 A flows through a wire for 20 s. Calculate the total charge that passes a point in the wire.
(b)[2 marks]If the same amount of charge passed in 10 s instead of 20 s, what would be the new current?
Question 74
1 mark · Normal
Answer and check →Which of the following correctly defines 1 coulomb?
- A.The amount of charge passing a point when 1 A flows for 1 s
- B.The potential difference across a 1 \Omega resistor
- C.The energy transferred by a current of 1 A in 1 s
- D.The charge on a single electron
Question 75
3 marks · Normal
Answer and see the solution →Explain, with reference to charge, what happens at the atomic level when an atom becomes negatively charged.
Question 76
4 marks · Normal
Answer and see the solution →Describe a method for investigating how insulating materials can be charged by friction. Include how you would test if the materials are charged.
Question 77
1 mark · Normal
Answer and check →Which statement about electric charge is correct?
- A.Electric charge is measured in amperes (A).
- B.Electric charge can be transferred by electrons.
- C.Electric charge is created when a magnet moves.
- D.Electric charge is only found in metals.
Question 78
3 marks · Normal
Answer and see the solution →A student says that rubbing a plastic rod with a cloth creates new charge. Explain why this statement is incorrect.
Question 79
2 marks · Normal
Answer and see the solution →A current of 1.3 A flows for 15 seconds. Calculate the amount of charge transferred. Give your answer with the correct unit.
Question 80
2 marks · Hard
Answer and see the solution →Explain why the coulomb (C) is a suitable unit for measuring electric charge. Refer to the definition of current in your answer.