Physics Electromagnetic Induction PMDC 2020
PMDC Verified Question 64 of 69
Transformer is a device which steps up or steps down the input:
A
Current
B
Voltage
C
Energy
D
Power
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Voltage
Concept:

A transformer operates on mutual induction to alter electrical parameters between primary and secondary circuits.

Solution:

  • The primary purpose of a transformer is to step up (increase) or step down (decrease) alternating voltage. The current changes inversely to maintain power conservation.


Why other options are incorrect:

While current changes as a consequence, the terminology 'step-up/down' explicitly refers to the voltage level. An ideal transformer conserves Energy and Power, so it cannot step them up.

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