Question 76 of 153
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 with a constant velocity. If the induced EMF is , then value of n is _.
Show answer and solution
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.
$\begin{aligned}
& \text { induced emf } E=B / v \\
& =c B v^2 t
\end{aligned}$
i.e.
$\begin{aligned}
& \text { induced emf } E=B / v \\
& =c B v^2 t
\end{aligned}$
