A straight conductor of mass m and carrying a current i is hinged at one end and placed in a plane perpendicular to the magnetic field B as shown in figure. At any moment if the conductor is let free, then the angular acceleration of the conductor will be (neglect gravity) –
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
Force acting on the elementary portion of the current carrying conductor
Torque of this force, on this element, about ' 0 '
Hence total torque about 
Angular acceleration 
Here Moment of inertia 
Hence 
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