A circular copper loop is placed perpendicular to a uniformmagnetic field of 0.5

Question

A circular copper loop is placed perpendicular to a uniformmagnetic field of 0.50 T. Due to external forces, the area of theloop decreases at a rate of 1.26 ×10–3 m2/s. Determine theinduced emf in the loop.

b. 3.1 V
c. 7.9 ×10–3 V
d. 3.1 ×10–4 V
e. 6.3 × 10–4 V A circular copper loop is placed perpendicular to a uniformmagnetic field of 0.50 T. Due to external forces, the area of theloop decreases at a rate of 1.26 ×10–3 m2/s. Determine theinduced emf in the loop. 3.1 V 7.9 ×10–3 V 3.1 ×10–4 V 6.3 × 10–4 V

Explanation / Answer

Answer : (e) We know that                         = -Nd/dt                           = -NB(dA/dt)                           = -(1)(0.50T)(1.26 ×10–3m2/s)                           = 6.3*10-4V      

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