Which of the following cannot be stepped up in a transformer?

(a)

input current

(b)

input voltage

(c)

input power

(d)

all

If a secondary coil has 40 turns, and a primary coil with 20 turns is charged with 50V of potential difference, then potential difference in secondary would be ________________.

(a)

50 V

(b)

25 V

(c)

60 V

(d)

100 V

Which current- time graph represents the steady movement of short magnet through a coil XY?

(a)

(b)

(c)

(d)

The unit of self inductance is ________________.

(a)

Henry

(b)

Ampere

(c)

Farad

(d)

Ohm

The self-inductance Lof a solenoid is given as _________________.

(a)

\(L=\frac { { \mu }_{ o }NA }{ l } \)

(b)

\(L=\frac { { \mu }_{ o }{ NA }^{ 2 } }{ l } \)

(c)

\(L=\frac { { \mu }_{ o }{ N }^{ 2 }A }{ l } \)

(d)

\(L=\frac { { { \mu }_{ o }A } }{ Nl } \)