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  4. A rectangular conduct or P Q R S in which the conductor P Q is free to move is shown in figure. The rod P Q is moved towards the left with a constant velocity v as shown in figure. Assume that there is no loss of energy due to friction. P Q R S forms a closed circuit enclosing an area that changes as P Q moves. It is placed in a uniform magnetic field B which is perpendicular to the plane of this system. The length R Q=x and R S=l. <img class=img-fluid question-image alt=image src=https://cdn.tardigrade.in/img/question/physics/12e59ee4708b7e977b7f9597945c0147-.png /> The induced emf B l v is called

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Q. A rectangular conduct or $P Q R S$ in which the conductor $P Q$ is free to move is shown in figure. The rod $P Q$ is moved towards the left with a constant velocity $v$ as shown in figure. Assume that there is no loss of energy due to friction. $P Q R S$ forms a closed circuit enclosing an area that changes as $P Q$ moves. It is placed in a uniform magnetic field $B$ which is perpendicular to the plane of this system.
The length $R Q=x$ and $R S=l$.
image
The induced emf $B l v$ is called

Electromagnetic Induction

Solution:

The induced emf $B l v$ is called motional emf. Thus, we are able to produce induced emf by moving a conductor instead of varying the magnetic field, that is by changing the magnetic flux enclosed by the circuit.