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2 marksElectrostatics

CSEC Physics · 1998 · Paper 2 · Question 2(a)(i)

A polythene rod rests on two curved watch glasses acting as a low-friction pivot. A negatively charged rod is brought close to one end of the polythene rod.

If the polythene rod is attracted, state TWO possible conclusions that might be drawn.

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Other parts of this question

  1. 2(a)(ii)State the conclusion that could be drawn if the rods repelled each other.[1 mark]
  2. 2(b)(i)Mark on Figure 3 the direction of conventional current flow.[1 mark]
  3. 2(b)(ii)Identify what kind of charge actually moves in the wire.[1 mark]
  4. 2(b)(iii)State the direction in which the charges move (from which sphere to which sphere).[1 mark]
  5. 2(b)(iv)State the SI unit of electric charge and give its definition.[2 marks]
  6. 2(b)(v)Calculate how much charge is transferred through the wire if a current of 3 µA flows for 2 ms.[4 marks]
  7. 2(c)Calculate the charge stored in a 40 amp-hour battery using the SI unit for charge.[3 marks]

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