Which one of the following devices changes low voltage alternating current to high voltage alternati...........

General Science (NDA) Physics

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

Generator

Motor

Transformer

Vibrator

Explanation:

Transformer is a machine which changes low voltage to high voltage and vice versa. This change of volt age is obtained by two types of trans formers
(i) Step-up transformer
(ii) Step-down transformer
In step-up transformer, the number of turns
in secondary NS > NP (Number of turns in primary).
Similarly in step-down transformer NS < NP .