NEETPhysics-Electromagnetic Induction
NEET Physics Motional EMF MCQ Question
Type: MCQ-numerical-Medium-Class 12
A metallic rod of length 'L' is rotated with an angular speed of 'ω' normal to a uniform magnetic field 'B' about an axis passing through one end of rod as shown in figure. The induced emf will be:
A
1/4 B²Lω
B
1/4 B²L²ω
C
1/2 BL²ω
D
1/2 B²L²ω
Correct Answer
Option C
Detailed Explanation
The induced emf in a rotating rod is given by ε = 1/2 BωL², where B is the magnetic field, ω is the angular velocity, and L is the length of the rod.
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