COMEDK · Physics · 23. Alternating Current
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
- 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 \(0.5 \mathrm{~mA}\)
Answer & Solution
Correct Answer
(C) \(0\) and \(0\)
Step-by-step Solution
Detailed explanation
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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