A transformer has 100 turns in its primary coil and 200 turns in its secondary coil. If a 200 V dc is connected across primary winding, then the voltage appearing across secondary will be
Text Solution
Verified by ExpertsThe correct answer is:
D
A transformer works only with AC , because it needs a changing magnetic flux to induce emf in the secondary coil.
With DC, the flux is constant 
no induced emf .
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