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प्रश्न
What is motional emf?
What is meant by Motional emf?
दीर्घउत्तर
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उत्तर
Motional emf (electromotive force) is the voltage generated across a conductor when it moves through a magnetic field.
When a conductor (like a metal rod) moves at a velocity (v) through a magnetic field (B), the free charges inside it experience a Lorentz force. This force pushes positive and negative charges toward opposite ends of the conductor, creating a potential difference.
ε = Blv
Where:
B is the magnetic field strength.
l is the length of the conductor.
v is the velocity of the conductor.
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