A cycle wheel with 64 spokes is rotating with N rotations per sec… - Vidyadip

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:

✓
$\text{E}$
B
$2\text{E}$
C
$\frac{\text{E}}{2}$
D
$\frac{\text{E}}{4}$

✓

Answer

Correct option: A.

$\text{E}$

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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