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Transformer MCQs Quiz Online PDF Download eBook

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MCQs on Transformer PDF Download eBook

MCQ: In a transformer, the primary coil is connected to

  1. Alternating current (AC) source
  2. Direct current (DC) source
  3. resistor
  4. inductor

A

MCQ: A transformer is designed to convert the voltage from 240 V a.c mains to 12 V, and has 4000 turns on its primary coil. The turns on its secondary coil should be

  1. 100
  2. 200
  3. 120
  4. 480

B

MCQ: In transformer the changing current in primary coil induces changing magnetic field in

  1. resistor
  2. inductor
  3. insulator
  4. secondary coil

D

MCQ: A transformer is designed to convert the voltage from 240 V a.c mains to 12 V, and has 4000 turns on its primary coil. If it is 100% efficient, and the current in the secondary coil was 0.4 A then the current in the primary coil should be

  1. 0.08 A
  2. 0.05 A
  3. 0.02 A
  4. 0.01 A

C

MCQ: If the secondary voltage is larger than the primary voltage, the transformer is called a

  1. positive transformer
  2. step-up transformer
  3. negative transformer
  4. step-down transformer

B