A circular coil 11.0 cm in diameter and containing nine loops lies flat on the g

Question

A circular coil 11.0 cm in diameter and containing nine loops lies flat on the ground. The Earth's magnetic field at this location has magnitude 4.50 times 10^-5 T and points into the Earth at an angle of 52.0 degree below a line pointing due north. A 7.80-A clockwise current passes through the coil. Determine the torque on the coil. Express your answer using three significant figures and include the appropriate units. Which edge of the coil rises up: north, east, south, or west? east north west south

Explanation / Answer

(a) Torque=(# of turns)(amps)(teslas)(Pi r^2) cos(theta)
Torque= (9)(7.8)(4.5E-5)(Pi .055^2) (cos52)
Torque= 1.85x10^-5 N m

(b) North

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