A circular loop of wire with area 0.010m2 lies in the x-y plane. Initially there

Question

A circular loop of wire with area 0.010m2 lies in the x-y plane. Initially there's a magnetic field of 4.0T in the -z-direction. The field remains constant for 10s , then decreases gradually to zero in 10s , and then remains zero for 10s .

Part A: Find the magnitude of the induced emf in the loop for the first 10s interval.

Part B: Find the direction of the induced emf in the loop for the first 10s interval.

Part C: Find the magnitude of the induced emf in the loop for the second 10s interval.

Part D: Find the direction of the induced emf in the loop for the second 10s interval.

Part E: Find the magnitude of the induced emf in the loop for the third 10s interval.

Part F: Find direction of the induced emf in the loop for the 3rd 10s interval

Explanation / Answer

change in flux causes emf

flux = B.A

Part A : change in flux = 0, as magnetic field constant

so, induced emf = 0

Part B: Not Applicable, as emf = 0

Part C :emf = d(flux/dt) = 4*0.01/10 = 0.004 V

Part D : anticlockwise direction

Part E : change in flux = 0, as magnetic field constant

so, induced emf = 0

Part F : Not Applicable as induced emf = 0

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