(part 1 of 2) A circular coil of 235 turns and area 0.7 m^2 is in a uniform magn

Question

(part 1 of 2)
A circular coil of 235 turns and area 0.7 m^2 is in a uniform magnetic ?eld of 0.27 T. The maximum torque exerted on the coil by the ?eld is 0.0045 N · m. Calculate the current in the coil.
Answer in units of A
(part 2 of 2)
Assume the 235 turns of wire are used to form a single-turn coil with the same shape but much larger area. What is the current if the maximum torque exerted on the coil by the ?eld is 0.0045 N · m?
Answer in units of A

Explanation / Answer

part 1> t = NBiA i = t/NBA i = 0.0045/(235 x 0.7 x 0.27) i = 1.013*10^-4 A i = t/NBA = .0045/(1*.7*235^2*.27) = 4.3*10^-7 A

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