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JAMB Physics 2011 Question 36

Question 36

Electrostatics

The correct expression for the potential at a point, distance r from a charge q, in an electric field is

  1. A.q/(4πε0r2)
  2. B.q/(4πε0r)
  3. C.q2/(4πε0r2)
  4. D.q2/(4πε0r)
Show the answer and explanation

Answer: B (q/(4πε0r))

Explanation

The potential of a point charge is V = q/(4πε0r). The expression with r2 is the electric field strength.