First slide
Magnetic flux and induced emf
Question

Two identical cycle wheels (geometrically) have different number of spokes connected from center to rim. One is having 20 spokes and the other having only 10 (the rim and the spokes are resistanceless). One resistance of value R is connected between center and rim. The current in R will be

Moderate
Solution

Since all the wires are connected between rim and axle, they will generate induced emf in parallel, hence it is same for any number of spokes.

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