Question

Q.No 13. write down the expression
for energy stored in a magnetic field
The mutual inductance of the two
coils is given as 1.5 H.The self
inductance of the coils are : L1 = 5H
.L2 =4H ,find the coefficient of
coupling between the coils.​

Answer 1

Answer:

k = 0.335

Explanation:

The formula for the energy stored in a coil placed in a  magnetic field is given as

E = 1/2 x L x I^2

where L is the self-inductance of the coil and I is the current that is passing through the coil.

Now in order to find the coefficient of coupling between two coils when given mutual and self inductances, we use the following formula

k = M / $\sqrt{L1 x L2}$

K = 1.5 / $\sqrt{5 x 4}$

k = 0.335