List of top Questions asked in MET- 2018

The bob A of a simple pendulum is released when the string makes an angle of $45^{\circ}$ with the vertical. It hits another bob B of the same material and same mass kept at rest on the table. If the collision is elastic}
Energy needed in breaking a drop of radius $R$ into $n$ drops of radii $r$ is given by
The stopping potential for photoelectric emission from a metal surface is plotted along Y-axis and frequency v of incident light along X-axis. A straight line is obtained as shown. Planck's constant is given by}
A parallel beam of monochromatic light is incident normally on a slit. The diffraction pattern is observed on a screen placed at the focal plane of a convex lens. If the slit width is increased, the central maximum of the diffraction pattern will
A battery of emf 12 V and internal resistance $2\Omega$ is connected in series with a tangent galvanometer of resistance $4\Omega$. The deflection is $60^{\circ}$ when the plane of the coil is along the magnetic meridian. To get a deflection of $30^{\circ}$, the resistance to be connected in series with the tangent galvanometer is
A spring balance is attached to the ceiling of a lift. A man hangs his bag on the spring and the spring reads $49~\mathrm{N}$ when the lift is stationary. If the lift moves downward with an acceleration of $5\mathrm{m} / \mathrm{s}^2$, the reading of the spring balance will be
A uniform wire of resistance $9\Omega$ is cut into 3 equal parts. They are connected in the form of equilateral triangle ABC. A cell of emf 2V and negligible internal resistance is connected across B and C. Potential difference across AB is
In a potentiometer experiment two cells of emf $E_{1}$ and $E_{2}$ are used in series and in conjunction and the balancing length is found to be $58~\mathrm{cm}$ of the wire. If the polarity of $E_{2}$ is reversed, then the balancing length becomes $29~\mathrm{cm}$. The ratio $\frac{E_1}{E_2}$ of the emfs of the two cells is}
A straight conductor carries a current of 5 A. An electron travelling with a speed of $5\times 10^{6}\mathrm{ms}^{-1}$ parallel to the wire at a distance of $0.1\mathrm{m}$ from the conductor, experiences a force of}
A body cools in 7 min from $60^{\circ}C$ to $40^{\circ}C$. What times (in min) does it take to cool from $40^{\circ}C$ to $28^{\circ}C$, if surrounding temperature is $10^{\circ}C$? (Assume Newton's law of cooling)}
A mass $3m$, initially at rest at the origin explodes into three fragments of equal mass. Two of the fragments have speed $\nu$ each and move perpendicular to each other. The third fragment will move with a speed
Three concurrent forces of the same magnitude are in equilibrium. What is the angle between the forces? Also, name the triangle formed by the forces as sides
Standing waves are formed on a string when interference occurs between two waves having
An open tank filled with water (density $\rho$) has a narrow hole at a depth of $h$ below the water surface. The velocity of water flowing out is
A thin convex lens of refractive index 1.5 has $20~\mathrm{cm}$ focal length in air. If the lens is completely immersed in a liquid of refractive index 1.6, its focal length will be}
The binding energy per nucleon is maximum in the case of
A transformer of $100%$ efficiency has 200 turns in the primary and 40000 turns in secondary. It is connected to a $220~\mathrm{V}$ main supply and secondary feeds to a $100\mathrm{k}\Omega$ resistance. The potential difference per turn is
In a single slit diffraction pattern, the distance between the first minimum on the left and the first minimum on the right is $5\mathrm{mm}$. The screen on which the diffraction pattern is displayed is at a distance of $80~\mathrm{cm}$ from the slit. The wavelength is $6000\mathrm{\AA}$. The slit width in (mm) is about
When a ray is incident on a medium of refractive index $n$ at Brewster's angle, it gets
A solenoid of length $50~\mathrm{cm}$ and a radius of cross-section $1\mathrm{cm}$ has 1000 turns of wire wound over it. If the current carried is 5A, the magnetic field on its axis, near the centre of the solenoid is approximately (permeability of free space $\mu_{0} = 4\pi \times 10^{-7}\mathrm{T}\cdot \mathrm{m / A}$)
At great distances from an electric dipole, the electric field strength due to the dipole varies with the distance as
A charged particle travels along a straight line with a speed $\nu$ in a region where both electric field $\mathbf{E}$ and magnetic fields $\mathbf{B}$ are present. It follows that}