Explanation Given data: The radius of the circular loop is 9.0 cm . The uniform magnetic field is of amplitude 0.35 -T . The reshaping of the circular loop is done in 0.10 s . Formula used: The expression for the induced emf is given by: ε i n = | Δ Φ Δ t | Here, Δ Φ is the change in magnetic flux and Δ t is the change in time. The expression for the magnetic flux through an area is given by, Φ = B A cos θ Here, B is the magnitude of uniform magnetic field, A is the area through which the magnetic field passes, and θ is the angle between the magnetic field B → and normal of the area. The expression for the area of the circular loop is given as, A = π r 2 Here, r is the radius of the circular loop. The conversion formula to convert centimeter into meter is given as, 1 cm = 10 − 2 m Explanation: According to Faraday’s law of electromagnetic induction, the value of induced emf in the coil is equal to change in magnetic flux through the coil. Assume the loop to be reshaped into an infinitely thin wire. Recall, the expression for the induced emf. ε i n = | Δ Φ Δ t | Substitute, B A cos θ for Δ Φ . ε i n = | B A cos θ Δ t | Substitute, π r 2 for A

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Chapter 21, Problem 27P

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The average induced emf when a circular loop of radius 9.0 cm is placed perpendicular to a uniform magnetic field of amplitude 0.35 -T, and is reshaped in 0.10 s into a long and thin shape, along with the assumptions, if made.

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Chapter 21, Problem 26P

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Chapter 21 Solutions

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The average induced emf when a circular loop of radius 9.0 cm is placed perpendicular to a uniform magnetic field of amplitude 0.35 -T , and is reshaped in 0.10 s into a long and thin shape, along with the assumptions, if made.

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The average induced emf when a circular loop of radius 9.0 cm is placed perpendicular to a uniform magnetic field of amplitude 0.35 -T, and is reshaped in 0.10 s into a long and thin shape, along with the assumptions, if made.

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