NEET · Physics · STD 12 -6. Electromagnetic induction
A wheel with \(20\) metallic spokes each \(1 \,m\) long is rotated with a speed of \(120 \,rpm\) in a plane perpendicular to a magnetic field of \(0.4 \,G\). The induced emf between the axle and rim of the wheel will be \(\left(1 \;G =10^{-4} \;T \right)\)
- A \(2.51 \;V\)
- B \(2.51 \times 10^{-4} \;V\)
- C \(2.51 \times 10^{-5} \;V\)
- D \(4.0 \times 10^{-5} \;V\)
Answer & Solution
Correct Answer
(B) \(2.51 \times 10^{-4} \;V\)
Step-by-step Solution
Detailed explanation
Considering one spoke (OP) as given in diagram. Induced emf across one spoke (OP),
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