Straight conductor of mass 
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:
A
The force acting one elementary portion of the current carrying conductor is given as
The torque applied by dF about 
⇒ The total torque about O is 
given by
The angular acceleration
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