Question

Two concentric and coplanar circular loops a and b have their radii in thev2:3 ratio .loop a carries a current in 6a in the clockwise direction. for them.f to be zero at the common centre loops must carry

Answer 1

Answer:

Loop b will carry 9 A current in counter clockwise direction

Explanation:

As we know that magnetic field at the common center due to two loops is zero

so we can say that the magnitude of magnetic field will be equal but opposite in direction

so we will have

$B_1 = B_2$

$\frac{\mu_0 i_1}{2R_1} = \frac{\mu_0 i_2}{2R_2}$

so we will have

$i_2 = \frac{R_2}{R_1} i_1$

so we have

$i_2 = \frac{3}{2}(6A)$

$i_2 = 9A$

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Topic : Magnetic field due to current loop

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Answer 2

Answer:

Answer in photo

Explanation:

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