Previous year MCQs

General science UPPSC 2017 GS-I
Question

A mobile phone charger is:

Answer & Solution

Answer: (Detailed Solution Below)

Option D: A step-down transformer

Detailed Solution:

The correct answer is “A step-down transformer”.
A mobile phone charger is a step-down transformer.It takes the high voltage AC power from the wall outlet and transforms it into a lower voltage DC power that is suitable for charging the phone's battery.

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