List of top Questions asked in MET

The starter motor of a car draws a current \(I = 300\) A from the battery of voltage 12 V. If the car starts only after 2 minutes, what is the energy drawn from the battery?
A coil of 100 turns carries a current of 5 mA and creates a magnetic flux of \(10^{-5}\) Wb. The inductance is
Consider four circuits shown in the figure below. In which circuit power dissipated is greatest? (Neglect the internal resistance of the power supply).
Two capacitors \(C_1\) and \(C_2 = 2C_1\) are connected in a circuit with a switch between them as shown in the figure. Initially the switch is open and \(C_1\) holds charge Q. The switch is closed. At steady state, the charge on each capacitors will be
Binding energy per nucleon plot against the mass number for stable nuclei is shown in the figure. Which curve is correct?
A thermodynamic system is taken through the cycle PQRSP process. The net work done by the system is
A light ray from air is incident (as shown in figure) at one end of a glass fiber (refractive index \(\mu = 1.5\)) making an incidence angle of 60° on the lateral surface, so that it undergoes a total internal reflection. How much time would it take to traverse the straight fiber of length 1 km?
A particle is moving in a vertical circle. The tensions in the string when passing through two positions at angles 30° and 60° from vertical (lowest positions) are \(T_1\) and \(T_2\), respectively. Then
If no external voltage is applied across p-n junction, there would be
Light travelling from a transparent medium to air undergoes total internal reflection at an angle of incidence of 45°. Then refractive index of the medium may be
A point object O is placed in front of a glass rod having spherical end of radius of curvature 30 cm. The image would be formed at
In the formation of a rainbow light from the sun on water droplets undergoes
A force F acting on a body depends on its displacement S as \(F \propto S^{-1/3}\). The power delivered by F will depend on displacement as
A laser device produces amplification in the
The dominant contribution to current comes from holes in case of
The valence band and conduction band of a solid overlap at low temperature, the solid may be
When a spring is stretched by 2 cm, it stores 100 J of energy. If it is stretched further by 2 cm, the stored energy will be increased by
In Young's double slit experiment the wavelength of light was changed from 7000 \AA to 3500 \AA while doubling the separation between the slits. Which of the following is not true for this experiment?
Two wires A and B are of same materials. Their lengths are in the ratio 1:2 and diameters are in the ratio 2:1. When stretched by forces \(F_A\) and \(F_B\) respectively, they get equal increase in their lengths. Then the ratio \(F_A : F_B\) should be
The coherence of two light sources means that the light waves emitted have
Mixed He\(^+\) and O\(^{2+}\) ions (mass of He\(^+\) = 4 amu and that of O\(^{2+}\) = 16 amu) beam passes a region of constant perpendicular magnetic field. If kinetic energy of all the ions is same, then
A body moves a distance of 10 m under the action of force \(F = 10\) N. If the work done is 25 J, the angle which the force makes with the direction of motion is
The separation between C and O-atoms in CO is 1.2 \AA. The distance of carbon atom from the centre of mass is
A thin metal plate P is inserted halfway between the plates of a parallel plate capacitor of capacitance C in such a way that it is parallel to the two plates. The capacitance now becomes
An inclined plane makes an angle 30° with horizontal. A solid sphere rolling down this inclined plane has a linear acceleration of