induced emf motion hard

Question

Rod length ℓ moving perpendicular to B with speed v. Induced EMF is:

RankGuru · Accepted Answer

This is called **Motional EMF**.
- When a rod of length $l$ moves at speed $v$ inside a uniform magnetic field $B$, the Lorentz force ($F = qvB$) pushes charges to opposite ends of the rod.
- This separation of charge creates a potential difference.
- The induced EMF magnitude is:
$E = B l v \sin 	heta$
where $	heta$ is the angle between $\vec{v}$ and $\vec{B}$. For perpendicular motion, $\sin 90^\circ = 1$.

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induced emf motion hard

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