Question

The primary of a transformer when connected to a dc battery of 10 Volt draws a current of 1 mA. The number of turns of the primary and secondary windings are 50 and 100 respectively. The voltage in the secondary and the current drawn by the circuit in the secondary are respectively 

(a) 20 V and 2.0 m A 

(b) 10 V and 0.5 m A 

(c) Zero volt and therefore no current 

(d) 20 V and 0.5 m A

Answer 1

Correct option  (c) Zero volt and therefore no current 

Explanation:

Transformer cannot work on dc.

V_s = 0 and l_s = 0