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The primary and secondary coils of a tra...

The primary and secondary coils of a transmformer have `50` and `1500` turns respectively. If the magnetic flux `phi` linked with the primary coil is given by `phi=phi_(0)+4t`, where `phi` is in weber, `t` is time in second and `phi_(0)` is a constant, the output voltage across the secondary coil is

A

90 volts

B

120 volts

C

220 volts

D

30 volts

Text Solution

Verified by Experts

The correct Answer is:
B
`N_(P)=50,N_(S)=1500`
`varphi_(P)=varphi_(0)+4trArre_(P)=|-(dvarphi)/dt|=4"Volt"`
`thereforeN_(P)/N_(S)=e_(P)/e_(S)rArre_(S)=4xx1500/50=120"Volt"`.
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