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Transformers

In a step up ...

Question

In a step up transformer :
(a) $N_{s} = N_{p}$ (b) $N_{s} < N_{p}$
(c) $N_{s} > N_{p}$ (d) nothing can be said.

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Solution

N_S> N_P

Since a step-up transformer is used to change a low voltage alternating e.m.f. to a high voltage alternating e.m.f. of the same frequency, the number of turns in the secondary coil is more than the number of turns in the primary coil, i.e. N_S> N_P.

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