NDA 2017 Physics question

Which one of the following devices changes low voltage alternating current to high voltage alternating current and vice versa ?

(A)Generator
(B)Motor
(C)TransformerCorrect
(D)Vibrator

Answer: (C)

Solution

A transformer changes the voltage of an alternating current by mutual induction between its primary and secondary coils: a step-up transformer raises the voltage and a step-down

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Question ID VK-030692