Motional EMF
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 E ∝ tn, then value of n is _________.
Numerical answer type. Work it out, then open the answer.
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Answer: 1
- Bar starts at the vertex and moves up with constant , so its height is .
- Length of bar between the rails ( = half-angle of the V).
- , so .
- So .