NEET2018Physics-Magnetism
NEET 2018 Physics Magnetic Force on a Current-Carrying Conductor MCQ Question
Type: MCQ-numerical-Hard-Class 12
A metallic rod of mass per unit length 0.5 kg m⁻¹ is lying horizontally on a smooth inclined plane which makes an angle of 30° with the horizontal. The rod is not allowed to slide down by flowing a current through it when a magnetic field of induction 0.25 T is acting on it in the vertical direction. The current flowing in the rod to keep it stationary is
A
7.14 Å
B
5.98 Å
C
14.76 Å
D
11.32 Å
Correct Answer
Option B
Detailed Explanation
Using the formula F = BIL sin θ, where F is the gravitational force component along the incline, we find the current required to balance this force.
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