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JAMB Physics 2001 Question 26

Question 26

Electrostatics

A student is at a height 4 m above the ground during a thunderstorm. Given that the potential difference between the thundercloud and the ground is 107 V, the electric field created by the storm is

  1. A.2.0 × 106 N C−1
  2. B.2.5 × 106 N C−1
  3. C.1.0 × 107 N C−1
  4. D.4.0 × 107 N C−1
Show the answer and explanation

Answer: B (2.5 × 106 N C−1)

Explanation

Taking the 4 m as the distance over which the 107 V acts, E = V/d = 107/4 = 2.5 × 106 N C−1.