Problem

Two different coils have self-inductances

L_1 = 8 \text{ mH}

and

L_2 = 2 \text{ mH}

. The current in one coil is increased at a constant rate. The current in the second coil is also increased at the same constant rate. At a certain instant of time, the power given to the two coils is the same. At that time, the current, the induced voltage and the energy stored in the first coil are

i_1

V_1

and

W_1

respectively. Corresponding values for the second coil at the same instant are

i_2

V_2

and

W_2

respectively. Then, (a)

\frac{i_1}{i_2} = \frac{1}{4}

(b)

\frac{i_1}{i_2} = 4

(c)

\frac{W_1}{W_2} = \frac{1}{4}

(d)

\frac{V_1}{V_2} = 4

Browse the problem library