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Electromagnetic Induction — Physics STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 SciencePhysicsElectromagnetic Induction1 Mark
MCQ
A cycle wheel with 64 spokes is rotating with N rotations per second at right angles to horizontal component of magnetic field. The induced emf generated between its axle and rim is E. If the number of spokes is reduced to 32 then the value of induced emf will be:
  • A
    $\text{E}$
  • B
    $2\text{E}$
  • C
    $\frac{\text{E}}{2}$
  • D
    $\frac{\text{E}}{4}$
✓

Answer

  1. $\text{E}$

Explanation:

The emf induced is independent of the number of spoke and only depends on the lenght of spoke and the angular speed.

Therefore emf induced is same as before = E 

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