A uniform magnetic field exists in a direction perpendicular to the plane of a square…
PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences
Problem
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 T s−1 . The induced current in the loop is close to (Resistivity of the metal wire is 1.23×10−8Ω m )
(1) 0.43 A
(2) 0.61 A
(3) 0.34 A
(4) 0.53 A