A rectangular loop of length 2.5 m and width 2 m is placed at 60° to a magnetic field of 4 T. The loop is removed from the field in 10 s. The average emf induced in the loop during this time is

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(1) +1 V. A=2.5×2=5 m², and 60° is the angle with the normal. Φ=BA cos 60°=4×5×0.5=10 Wb. Pulling it out takes the flux to zero: ε=(10)/(10)=+1 V.

A rectangular loop of length 2.5 m and width 2 m is placed at 60° to a magnetic field of 4 T. The loop is removed from the field in 10 s. The average emf induced in the loop during this time is

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