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A transformer has 1000 turns in its primary coil and 50 turns in its secondary coil. If the primary is connected to a 220 V a.c. supply, th…

2581Medium DSSSB TGT Computer Science 0 replies 1 views

A transformer has 1000 turns in its primary coil and 50 turns in its secondary coil. If the primary is connected to a 220 V a.c. supply, the voltage across the secondary of this ideal transformer is

A4400 V
B11 V
C22 V
D110 V

Correct answer: B

Explanation

For an ideal transformer Vs / Vp = Ns / Np, so Vs = 220 × 50 / 1000 = 11 V, and the device is a step-down transformer.

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