Coefficients of coupling between two coils of self-inductances L1 and L1 is unity. It means:

Question

Coefficients of coupling between two coils of self-inductances L1 and L1 is unity. It means: (A) 50 % flux of L1 is linked with L2  (B) 100 % flux of L1 is linked with L2  (C)  √L1 time of flux L1 is linked with L2  (D) None of above

Tardigrade Admin · Accepted Answer

Two coils are said to be magnetically coupled, if full or a part of the flux produced by one links with the other. Let

L_{1}

and

L_{2}

be the self-inductances of the coils and

M

be their mutual inductances, then

k = \frac{M}{L _{1} L _{2}}

When

100%

flux produced by one coil links with the other, then mutual inductance between the two is maximum and is given by

M = L_{1} L_{2}

In that case,

k = 1

(unity)
Note: When there is no common flux between the two coils, they are said to be magnetically isolated. In this case,

k = C

and

M = 0.

In practice

k

lies between

O

and

1.

Q. Coefficients of coupling between two coils of self-inductances $L_{1}$ and $L_{1}$ is unity. It means:

$50%$ flux of $L_{1}$ is linked with $L_{2}$

$100%$ flux of $L_{1}$ is linked with $L_{2}$

$L_{1}$ time of flux $L_{1}$ is linked with $L_{2}$

None of above

Q. Coefficients of coupling between two coils of self-inductances L1​ and L1​ is unity. It means:

50% flux of L1​ is linked with L2​

100% flux of L1​ is linked with L2​

L1​​ time of flux L1​ is linked with L2​

None of above

Q. Coefficients of coupling between two coils of self-inductances $L_{1}$ and $L_{1}$ is unity. It means:

$50%$ flux of $L_{1}$ is linked with $L_{2}$

$100%$ flux of $L_{1}$ is linked with $L_{2}$

$L_{1}$ time of flux $L_{1}$ is linked with $L_{2}$