Pearson Edexcel International GCSE (9–1) · PHYSICS · Chapter
Electric Charge
74 practice questions
Topics covered
Practice questions
71–74 of 74
Question 71
2 marks · Normal
Answer and check →A student rubs a balloon on their hair and the balloon sticks to a wall. Which statement best explains this?
- A.The wall becomes positively charged and attracts the negatively charged balloon.
- B.Electrons move from the balloon to the wall, so both have the same charge.
- C.The wall loses protons to the balloon, making the balloon positive.
- D.The balloon becomes positively charged and is repelled by the wall.
Question 72
6 marks · Normal
Answer and see the solution →A student investigates materials for electrostatic paint spraying. She rubs a plastic rod with a woollen cloth, then uses the rod to try to move small pieces of aluminium foil. Next, she describes how electrostatic spraying works to paint car parts efficiently.
(a)[2 marks]Explain, using ideas about electrons, how rubbing the rod with the cloth causes them to become charged.
(b)[2 marks]The student finds the aluminium foil is attracted to the charged rod. State whether the foil must be charged or uncharged, and explain your answer.
(c)[2 marks]Describe how electrostatic paint spraying makes painting more efficient than using an ordinary spray.
Question 73
5 marks · Normal
Answer and see the solution →A science class uses plastic drinking straws to investigate static forces. First, they identify which straw materials are conductors and which are insulators. Then, they compare how a charged straw interacts with both an uncharged straw and a suspended, previously-rubbed straw.
(a)[2 marks]Describe how you could use a simple circuit with a bulb to determine whether a straw is an electrical conductor or an insulator.
(b)[1 mark]The students suspend an uncharged plastic straw and bring a second, charged plastic straw near it. What will happen? Explain your answer.
(c)[2 marks]Next, both straws are rubbed with the same cloth so they gain the same charge. Predict and explain the observation when one is brought close to the other.
Question 74
5 marks · Normal
Answer and see the solution →Static electricity can be helpful but also dangerous. Consider the uses and dangers of static charges in everyday life.
(a)[2 marks]Explain why fuel tankers are earthed before transferring fuel.
(b)[3 marks]Give two different situations where static electricity is used to solve a practical problem. For each, briefly explain how static charges are involved.