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5 marksElectric Fields

CAPE Physics Unit 2 · 2002 · Paper 1 · Question 3(d)(i)

Figure 3 shows two point charges, 40 μC and -10 μC, placed 20 cm apart.

Calculate the electric field strength at the midpoint between the two charges.

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Other parts of this question

  1. 3(a)State Coulomb's law for electrostatic charges.[1 mark]
  2. 3(b)(i)Explain what is meant by electric field strength.[1 mark]
  3. 3(b)(ii)Explain what is meant by electric potential.[1 mark]
  4. 3(c)State how electric field strength and electric potential are related.[1 mark]
  5. 3(d)(ii)Indicate on Figure 3, along the line joining the two point charges, the approximate position where the net electric field is zero.[1 mark]

More practice: the rest of this paper · more Electric Fields questions · all CAPE Physics Unit 2 past papers