Home UPPSC Prelims 2025 Mock Test Series MCQs

Question

What is the function of a transformer?

  1. To convert mechanical energy into electrical energy
  2. To convert electrical energy into mechanical energy
  3. To step up or step down voltage
  4. To store electrical energy

Answer:

Option C: To step up or step down voltage

Detailed Solution:

The correct answer is “To step up or step down voltage”.

A transformer is used to increase (step up) or decrease (step down) voltage levels in an AC circuit. It does not convert energy from one form to another like a motor or generator.