An electrical device has 50 turns in its primary coil and 20 turns in the secondary coil. The device can be a\an?

A. step-up transformer
B. step-down transformer
C. d.c generator
D. a.c generator

Correct Answer:

Option B – step-down transformer

Explanation

In a step down transformer, there are more turns in the primary coil than in the secondary coil and more current flows in the secondary circuit than in the primary.