Question

The emf induced in the circuit is

• A. $125\mu V$
• B. $250\mu V$
• C. $100\mu V$
• D. $300\mu V$

Answer 1

The correct option is B $250\mu V$

Area $A=lx$

Induced emf $e=\frac{d\left(BA\right)}{dt}=lx\frac{dB}{dt}+lB\frac{dx}{dt}$

$e=lx\left(0.2\right)-lBv...\left(xisdecreasing\right)$

At t=0, $e=0.05\times 0.05\times 0.2-0.05\times 0.1\times 0.05=250㎶$