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Question: Answered & Verified by Expert
The primary of a transformer when connected to a DC battery of $10 \mathrm{~V}$ draws a current of $1 \mathrm{~mA}$. 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
PhysicsAlternating CurrentCOMEDKCOMEDK 2013
Options:
  • A $20 \mathrm{~V}$ and $2.0 \mathrm{~mA}$
  • B $10 \mathrm{~V}$ and $0.5 \mathrm{~mA}$
  • C $0$ and $0$
  • D $20 \mathrm{~V}$ and $0.5 \mathrm{~mA}$
Solution:
1961 Upvotes Verified Answer
The correct answer is: $0$ and $0$
A transformer does not work on DC supply because mutual induction does not take place due to constant value of current. So, $V_{\mathrm{S}}=0$ and $I_{\mathrm{S}}=0$.

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