Two coils are at fixed locations. when coil 1 has no current and the current in coil 2 increases at the rate 17.8 a/s, the emf in coil 1 is 27.1 mv. (a) what is their mutual inductance? (b) when coil 2 has no current and coil 1 has a current of 4.00 a, what is the flux linkage in coil 2?

Part a)

Part b)

Explanation:

Part a)

As we know by Faraday's law

so we will have

so we will have

Part b)

As we know by Lenz law

so we have

wind moving at higher speeds will transfer more energy to the water, resulting in stronger waves.

speed of light in vacuum is 300,000 km/s

speed of light in other mediums is given by the expression v = c/n, where c is the speed of light in vacuum and n is the refractive index of medium.

for the first medium v = 200,000 km/s

  so, refractive index of medium = 300000/200000 = 1.5

    1.5 refractive index is usually for glass. so first medium is glass.

for the second medium v = 250,00 km/s

so, refractive index of medium = 300000/250000 = 1.2

    1.2 refractive index is usually for water. so second medium is water.

for the third medium v = 0 km/s

so, refractive index of medium = 300000/0 = ∞

    ∞ refractive index is usually for opaque mediums. so third medium is opaque medium.