Published by:
CGP EDU Academic Team
Published on: August 13, 2026
A wire of cross-sectional area A forms three sides of a square and is free to rotate about axis 
. If the structure is deflected by an angle θ from the vertical when current is passed through it is in a magnetic field B acting vertically upward and density of the wire is ρ, then the value of θ is given by
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
Let a is the side of square,
Torque of current 
Mass of each side 
Torque of gravity 
Now, both torques should be same
i.e., 
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