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JAMB Physics 2013 Question 37

Question 37

Electromagnetic Induction

Capacitors are used in the induction coil to

  1. A.control circuits.
  2. B.dissipate energy.
  3. C.prevent electric sparks.
  4. D.prevent distortion of electric fields.
Show the answer and explanation

Answer: C (prevent electric sparks.)

Explanation

The capacitor across the make-and-break contacts absorbs the surge when the circuit breaks, preventing sparking and making the current fall faster.