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Problem: (Figure 1) shows a 100-turn coil of wire of radius 11cm in a 0.35T magnetic field. The coil is rotated 90° in 0.30 s, ending up parallel to the field. What is the average emf induced in the coil as it rotates?

FREE Expert Solution

The average emf induced into the coil is given by:

ε=Nϕt, where Φ  is the magnetic flux, N is the number of turns, and t is the time.

Magnetic flux:

ϕB=BAcosθ, where B is the magnetic field, A is the cross-sectional area of the coil, and θ is the angle between the plane of the coil and the magnetic field.

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Problem Details

(Figure 1) shows a 100-turn coil of wire of radius 11cm in a 0.35T magnetic field. 

The coil is rotated 90° in 0.30 s, ending up parallel to the field. What is the average emf induced in the coil as it rotates?

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