Q.

The output voltage can be varied by a variac transformer over a 

  • A Very small range
  • BWide range of 0 and 120 per cent of input voltage
  • COver a range of 0 and 50 percent
  • DOver a range of 50 and 100 per cent 
Correct Answer : (B)

Wide range of 0 and 120 per cent of input voltage

Hints :

The output voltage can be varied by a variac transformer over a Wide range of 0 and 120 per cent of input voltage.

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