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A closely would solenoid of 2000 turns a...

A closely would solenoid of 2000 turns and area of cross-section `1.6xx10^(-4)m^(2)`. Carrying a current of 4.0A. Is suspended through its centre allowing it to turn in a horizontal plane.
(a) What is the magnetic moment associated with the solenoid?
(b) What is the force and torque on the solenoid if a uniform horizontal mangetic field of `7.5xx10^(-2)T` is set up at an angle of `30^(@)` the axis of the solenoid?

Text Solution

Verified by Experts

(a) `1.28A m^(-2)` along the axis in the direction related to the sence of current via the right handed screw rule.
(b) Forces is zero in uniform field torque = 0.048 Nm in a direction that tends to align the axis of the solenodi (i.e., its magnitude moment vector) along B.
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