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Question
In a step up transformer ______.
Options
Ns = Np
Ns < Np
Ns > Np
nothing can be said
Solution
In a step up transformer NS > NP.
Explanation:
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 same frequency, the number of turns in the secondary coil is more than the number of turns in the primary coil, i.e. Ns > Np.
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