Aflat coil having 160 turns, each with an area of 0.20 m 2, is placed with the plane of its area perpendicular to a magnetic field of 0.40 t. the magnetic field changes uniformly from 0.40 t in the + x direction to 0.40 t in the - x direction in 2.0 s. if the resistance of the coil is 16 ω, at what rate is power generated in the coil during this change?

10.2 Watt

Explanation:

 = number of turns in flat coil = 160

 = area = 0.20 m²

B₀= initial magnetic field = 0.40 T

 = final magnetic field = - 0.40 T

Change in magnetic field is given as

ΔB = B - B₀ = - 0.40 - 0.40 = - 0.80 T

 = time taken for the magnetic field to change = 2.0 s

Induced emf is given as

= 12.8 volts

= Resistance of the coil = 16 Ω

Power is given as

= 10.2 Watt

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