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Transformers - Engineering

Q1:

The primary of a transformer is connected to a 6 V battery. The turns ratio is 1:3 and the secondary load, RL, is 100 . The voltage across the load is

A 0 V

B 6 V

C 18 V

D 2 V

ANS:A - 0 V

We know that e=N(dflux/dt).

For dc supply flux is constant and derivative of constant is zero. So emf induced in secondary becomes zero i.e, e=0.