Question 1
FA student rubs two balloons, P and Q, on a wool jumper. Both balloons become negatively charged.
She hangs balloon P from a thread. She then holds balloon Q close to balloon P, without touching it.
The Figure shows what happens.
Figure
a.[2]
Explain how rubbing on the jumper makes the balloons negatively charged.
b.[2]
State the charge on the jumper after it has been rubbed. Give a reason for your answer.
c.[2]
Explain why balloon P moves away from balloon Q.
d.[1]
The student moves balloon Q closer to balloon P.
Describe what happens to the angle between the thread and the dashed line.
3.1 Static and charge Questions
43 exam-style questions on OCR GCSE Physics 3.1 Static and charge, covering 3.1.1 Positive and negative charge, 3.1.2 Static electricity and forces between charged objects, 3.1.3 Electron transfer and static electricity, 3.1.4 Electric fields, 3.1.5 Current as a flow of charge, 3.1.6 Current in a single closed loop, and 3.1.7 Charge, current and time. Each one has a worked solution and a mark scheme showing where the marks go.