A conducting bar moves on two conducting rails as shown in the figure. A constant magnetic field B exists into the page. The bar starts to move from the vertex at time $t=0$ with a constant velocity. If the induced EMF is $\mathrm{E} \propto \mathrm{t}^{\mathrm{n}}$ , then value of n is _.

Question

A conducting bar moves on two conducting rails as shown in the figure. A constant magnetic field B exists into the page. The bar starts to move from the vertex at time

t=0

with a constant velocity. If the induced EMF is

\mathrm{E} \propto \mathrm{t}^{\mathrm{n}}

, then value of n is _.

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Correct answer: 1

As the bar moves without change in orientation, the length of bar will be proportional to its distance from the vertex. i.e. I=c(v t) aligned & induced emf E=B / v & =c B v^2 t aligned n=1

A conducting bar moves on two conducting rails as shown in the...

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