Home PYQs UPPSC UPPSC MCQs Prelims 2017 (GS Paper I)

Question

A mobile phone charger is:

  1. An inverter
  2. AUPS
  3. A step-up transformer
  4. A step-down transformer

Answer:

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.