A magnetic field is directed perpendicular to the plane of a0.15 m × 0.30 m rect

Question

A magnetic field is directed perpendicular to the plane of a0.15 m × 0.30 m rectangular coil consisting of 120 loops of wire. To induce anaverage emf of 1.2 V in the coil, the magnetic field is increased from0.1 T to 1.5 T during a time interval t. Determine t. (a) 0.053 s (b) 1.6 s (c) 7.6 s (d) 0.13 s (e) 6.3 s A magnetic field is directed perpendicular to the plane of a0.15 m × 0.30 m rectangular coil consisting of 120 loops of wire. To induce anaverage emf of 1.2 V in the coil, the magnetic field is increased from0.1 T to 1.5 T during a time interval t. Determine t. (a) 0.053 s (b) 1.6 s (c) 7.6 s (d) 0.13 s (e) 6.3 s

Explanation / Answer

We have the formula for magnitude of the induced emf isgiven by               = A (dB/t) The time interval is given by               t = A (dB)/ Here = 1.2 V           dB =1.5 T - 0.1 T            A= 0.15 m × 0.30 m Substitute the values.

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