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Answer to Question #50957 in Electromagnetism for John

Question #50957
A rectangular coil of dimensions 20cm by 15cm lies with its plane parallel to a magnetic field of 0.5W/m^2. The coil, carrying a current of 10A experiences a torque of 4.5Nm in the field. How many loops has the coil?
a) 100
b) 60
c) 30
d) 20
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