Question

A uniform magnetic field B exists in a direction perpendicular to the plane of a square loop made of a metal wire. The wire has a diameter of 4 mm and a total length of 30 cm. The magnetic field changes with time at a steady rate dB/dt = 0.032 Ts^–1. The induced current in the loop is close to (Resistivity of the metal wire is 1.23 × 10^–8 Ωm) 

(1) 0.34 A 

(2) 0.61 A 

(3) 0.53 A 

(4) 0.43 A

Answer 1

(2) 0.61 A 

Area of loop = l²/16

I = 0.61 A

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