MCQ_SINGLE

An ideal solenoid is kept with its axis vertical. A current $I_{0}$ is flowing in the solenoid. A charge q is thrown vertically downward inside the solenoid. The acceleration of the charged particle is:

MCQ_SINGLE

Two disc having same moment of inertia about their axis. Thickness is $t_{1}$ and $t_{2}$ and they have same density. If $R_{1}/R_{2}=1/2$, then find $t_{1}/t_{2}$ :

MCQ_SINGLE

If the electric field of an EM wave is given by $60[\sin(3\times10^{14}t)+\sin(12\times10^{14}t)]$ at $x=0$ and it falls on a photosensitive material having work function $2.8 eV$, find the maximum kinetic energy (in eV) of the ejected electrons.

MCQ_SINGLE

A wave propagates whose electric field is given by $\vec{E}=69~\sin(\omega t-kx)\hat{j}$. Find the direction of the magnetic field.

MCQ_SINGLE

Two mechanical waves travel on strings of equal length L and equal tension T. The linear mass densities are in ratio $\frac{\mu_{1}}{\mu_{2}}=\frac{1}{2}$. Find the ratio of time taken for a wave pulse to travel from one end to the other.

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