Electromagnetic Induction - Electricity - Physics Previous Year Questions

In a closed circuit there is only a coil of inductance L and resistance 100 \(\Omega\). The coil is situated in a uniform magnetic field. All on a sudden, the magnetic flux linked with the circuit changes by 5 Weber. What amount of charge will flow in the circuit as a result?

A charged particle of charge q and mass m is placed at a distance 2R from the centre of a vertical cylindrical region of radius R where magnetic field varies as \(\vec{B}=\left(4 t^{2}-2 t+6\right) \hat{k}\), where t is time. Then which of the following statements is/are true?

A circular coil is placed near a current carrying conductor, both lying on the plane of the paper. The current is flowing through the conductor in such a way that the induced current in the loop is clockwise as shown in the figure. The current in the wire is,

The electric field of a plane electromagnetic wave of wave number k and angular frequency \(\omega\) is given \(\vec{E}=E_{0}(\hat{i}+\hat{j}) \sin (k z-\omega t)\). Which of the following gives the direction of the associated magnetic field \(\vec{B}\) ?

A charged particle in a uniform magnetic field \(\vec{B}=B_{0} \hat{k}\) starts moving from the origin with velocity \(v=3 \hat{\mathrm{i}}+4 \hat{\mathrm{k}} ~\mathrm{m} / \mathrm{s}\). The trajectory of the particle and the time \(t\) at which it reaches \(2 \mathrm{~m}\) above \(\mathrm{x}-\mathrm{y}\) plane are,

Two straight conducting plates form an angle \(\theta\) where their ends are joined. A conducting bar in contact with the plates and forming an isosceles triangle with them starts at the vertex at time \(t=0\) and moves with constant velocity \(\vec{v}\) to the right as shown in figure. A magnetic field \(\vec{B}\) points out of the page. The magnitude of emf induced at \(t=1\) second will be

Lenz's law of electromagnetic induction corresponds to the

A uniform but time varying magnetic field is present in a circular region of radius ' $R$ '. The magnetic field is perpendicular and into the plane of loop and the magnitude of field is increasing at a constant rate $\alpha$. There is a straight conducting rod of length 2 R placed as shown in figure. The magnitude of induced emf across the rod is

A square of side $L$ lies in the $x-y$ plane，where the magnetic field is given by $B=B_0(2 \hat{i}+3 \hat{j}+4 \hat{k})$ where $B_0$ is constant．The magnetic flux passing through the square is $L$