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JAMB Physics 1995 Question 42

Question 42

Capacitors

The purpose of a dielectric material in a parallel plate capacitor is to

  1. A.increase its capacitance
  2. B.decrease its capacitance
  3. C.insulate the plates from each other
  4. D.increase the magnetic field between the plates
Show the answer and explanation

Answer: A (increase its capacitance)

Explanation

A dielectric has a permittivity greater than air, so C = εA/d becomes larger.