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2 marksElectrostatics

CSEC Physics · May/June 2007 · Paper 2 · Question 5(a)(ii)

A negatively charged polythene strip attracts a small piece of insulating paper, as shown in Figure 4.

Explain why there is a net force of attraction.

This question uses a figure or table from the paper — you'll see it when you practise.

The mark scheme is shown once you've answered.

Practise this question

Other parts of this question

  1. 5(a)(i)Show, on the diagram above, the charge distribution on the paper.[2 marks]
  2. 5(a)(iii)Draw, on Figure 5 above, the charge distribution on the paper when it is in contact with the polythene strip.[1 mark]
  3. 5(a)(iv)State whether the paper gains or loses charge and the type of charge transferred, when it touches the strip.[2 marks]
  4. 5(b)(i)Draw, on Figure 6 above, electric field lines between the cloud and the earth.[2 marks]
  5. 5(b)(ii)Describe a precaution which may be taken to protect a building against lightning.[2 marks]
  6. 5(c)During a certain lightning strike, a current of 5 x 10⁴ A flows for a time period of 0.15 ms. Calculate the quantity of charge that flows from cloud to earth…[3 marks]

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