A 100% efficient transformer has 100 turns in the primary and 25 turns in its secondary coil. If the current in the secondary coil is 4 amp, then the current in the primary coil is
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a
1 amp
b
4 amp
c
8 amp
d
16 amp
answer is A.
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Detailed Solution
For 100% efficient transformer Vsis=Vpip⇒VsVp=ipis=NsNp⇒ip4=25100⇒ip=1A