Question

The magnitude of induced electromotive force in the secondary coil depends on:

• A. Ratio of the number of turns in the secondary coil to the number of turns in the primary coil.
• B. Ratio of the number of turns in the primary coil to the number of turns in the secondary.
• C. The magnitude of induced electromotive force in the primary coil.
• D. Both A and C

Answer 1

The correct option is D Both A and C

The magnitude of induced electromotive force in the secondary coil depends on the magnitude of induced electromotive force in the primary coil and the ratio of the number of turns in the secondary coil to the number of turns in the primary coil, i.e. $\frac{N_s}{N_p}$ = (transformer ratio)
For a given transformer,
$\frac{e.m.f.acrosssecondarycoil\left(E_s\right)}{e.m.f.acrossprimarycoil\left(E_p\right)}=\frac{Numberofturnsinthesecondarycoil\left(N_s\right)}{Numberofturnsintheprimarycoil\left(N_p\right)}$
$\frac{E_s}{E_p}=\frac{N_s}{N_p}=n$, where n is called the transformer ratio or turns ratio.