A rectangular conduct or \( P Q R S \) in which the conductor \( P ...

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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. PQRS 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 \( R S=l \).
It is also possible to explain the motional emf - expression Blv by invoking acting on the free of conductor \( P Q \).
(a) Lorentz force, neutral particles
(b) Henry force, atoms
(c) Lorentz force, charge carriers
- (d) Henry force, neutral particles
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