Alternating Current Ques 30
30. 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
[NEET Kar. 2013]
(a) $20 $ $V$ and $0.5$ $ mA$
(b) $20$ $ V$ and $2.0$ $ mA$
(c) $10 $ $V$ and $0.5$ $ mA$
(d) Zero and therefore no current flows
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Answer:
Correct Answer: 30.(d)
Solution:
- (d) A transformer is essentially an $A C$ device. $D C$ source, so no mutual induction between coils
$\Rightarrow E_2=0$ and $I_2=0$
BETA
