What is motional emf? Deduce an expression for it from the following diagram. If R be the resistance of the loop PQRS at a given instant, what will be the induced current at that instant? A straight conductor of length 0.1m moves with a speed of `10ms^(-1)` perpendicular to a magnetic field of induction `1Wbm^(-2)`. Calculate the induced emf. State Lenz's law.

Explanation

Given, `l=0.1m,v=10ms^(-1)` and `theta=90^(@)`
So, induced emf across the ends of straight conducting wire, e `Blvsintheta`
`=1xx0.1xx10=1V`