NEET Physics Motional EMF MCQ Question
What is the induced emf between the axle and the rim of a wheel with 10 metallic spokes, each 0.5 m long, rotated at a speed of 120 rev/min in a magnetic field of 0.4 G?
6.28 × 10⁻⁵ V
1.25 × 10⁻⁵ V
3.14 × 10⁻⁵ V
1.57 × 10⁻⁵ V
Correct Answer
Detailed Explanation
The induced emf is calculated using the formula (1/2) ω B R². In this case, it results in an emf of 6.28 × 10⁻⁵ V as shown in Example 6.7.
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