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2 marksElectric Fields

CAPE Physics Unit 2 · 2006 · Paper 1 · Question 3(c)(ii)

Electric field between two parallel metal plates separated by 1.5 mm under a high voltage V.

Explain the process by which sparks pass through the air between the plates when the electric field is sufficiently strong.

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Other parts of this question

  1. 3(a)Describe briefly, with the aid of a diagram, a practical application of electrostatics.[2 marks]
  2. 3(b)State why gowns worn in a hospital operating theatre are never made of synthetic materials such as nylon.[2 marks]
  3. 3(c)(i)Complete the diagram in Figure 3 to show the electric field between the plates.[1 mark]
  4. 3(c)(iii)Calculate the maximum voltage that can be applied to the plates without causing electrical breakdown, given the breakdown field strength of dry air is 3 x 10^6…[3 marks]

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