List of top Physics Questions on Motional Electromotive Force

A conducting rod of length 50 cm, with one end pivoted, is rotated with angular speed of 60 rpm in a uniform magnetic field of 4.0 mT directed perpendicular to the plane of rotation of rod. Find the emf induced in the rod.
A conducting rod of length 50 cm, with one end pivoted, is rotated with angular speed of 60 rpm in a uniform magnetic field of 4.0 mT directed perpendicular to the plane of rotation of rod. Find the emf induced in the rod.
In a coil the current varies from \(-3\,A\) to \(+3\,A\) in \(4\,s\), and induces an emf of \(0.2\,V\). The self inductance of the coil is
A conducting square loop of side L moves with a uniform speed V in a region of uniform magnetic field acting perpendicular to the plane of the loop and directed into it as shown in figure. The emf induced in the loop is:
A straight metallic rod of length $L$ is oriented horizontally and dropped vertically downward with a speed $v$ perpendicular to the horizontal component of the Earth's uniform magnetic field $B_H$. The instantaneous motional electromotive force (EMF) induced across the two ends of this rod is:
A conductor is moving with a speed of $10 \text{ m/s}$ in the direction perpendicular to the direction of magnetic field of induction $0.8 \text{ T}$. If it induces an E.M.F. of $8 \text{ V}$ between the ends of the conductor, the length of the conductor is \dots
In the figure shown, the conductor PQ of length \(l\) is moved from \(x = 0\) to \(x = b\) and then up to \(x = 2b\) with a constant velocity \(\vec{v}\). A uniform magnetic field \(\vec{B}\) is perpendicular to the plane of the paper and extends from \(x = 0\) to \(x = b\) and it is zero from \(x>b\). The magnitude of emf induced in the conductor is
A metal rod of length 0.5 m moves at $3~ms^{-1}$ perpendicular to a magnetic field of 0.2 T. The induced emf is ________.
A wire of length \( L \) and resistance \( R \) is falling vertically through Earth's horizontal magnetic field \( B \). What is the current induced in the wire when it has fallen a height \( L \)? (Take acceleration due to gravity as \( g \))
Figure shows a rectangular conductor PQRS in which the conductor PQ is free to move. The conductor PQ is moved towards the left with a constant velocity V as shown in the figure. Assume that there is no loss of energy due to friction. What will be the magnetic flux linked with the loop PQRS and the motional emf?
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Assertion (A): When a circular coil, placed in a region with its plane parallel to a magnetic field, expands radially outwards, no emf is induced in it. Reason (R): There is a constant magnetic field in the perpendicular (to the plane of the coil) direction.
A metal conductor of length $1\ \text{m}$ rotates vertically about one of its ends at an angular velocity of $5\ \text{rad/s}$. If the horizontal component of earth's magnetic field is $0.2 \times 10^{-4}\ \text{T}$, then the emf developed between the two ends of the conductor is
A straight conductor of length 0.6 m is moved with a speed of 10 $\text{ms}^{-1}$ perpendicular to a magnetic field of induction 1.2 $\text{Wb/m}^2$. The induced e.m.f. across the conductor is