List of top Questions asked in MET- 2020

If an observer moves towards a stationary source, then the apparent frequency is given by:

The horizontal component of earth’s magnetic field at a place is \(0.4 \times 10^{-4}\,T\). If the angle of dip is \(45^\circ\), the value of total intensity is:

An electric charge in uniform motion produces:

What is the direction of the electric field at the centre \(O\) of the square in the figure shown below? Given that, \( q = 10\,\text{nC} \) and the side of the square is \(5\,\text{cm}\).

If \( \lambda \) is the incident wavelength and \( \lambda_0 \) is the threshold wavelength for a metal surface, photoelectric effect takes place only if:

Which of the following relation is correct? (\(v_{\mathrm{rms}}\): root mean square velocity, \(\bar{v}\): mean velocity and \(v_{\mathrm{mp}}\): most probable velocity)

The mass number of an atom is 15 and its atomic number is 7. Now, this atom absorbs an \( \alpha \)-particle and emits a proton. What will be the mass number of changed atom?

Which equation is valid for adiabatic process?

Dimensions of Stefan’s constant is:

Time period of oscillation of mass \(m\) suspended from a spring is \(T\). What is the time period when the spring is cut in half and the same mass is suspended from one of the halves?

A mass \( m \) hanging from a spring is doing simple harmonic motion with frequency \( f \). If the mass is increased by 4 times, then frequency will be:

An electric current of \(2\,A\) passes through a wire of resistance \(25\,\Omega\). How much heat will be generated in \(1\,min\)?

A man at a distance \(11\,km\) from two pillars wants to see them separately. What will be the approximate distance between the pillars?

Internal energy of a gas remains unchanged in:
I. an isothermal process
II. an adiabatic process
III. a reversible process
IV. a cyclic process

A particle, doing simple harmonic motion, at a distance \(3\,cm\) from mean position has acceleration \(12\,cm/s^2\). What is its time period?

Thermal radiation exist in which part of electromagnetic spectrum?

A step up transformer has turn ratio \(10:1\). A cell of emf \(2\,V\) is fed to the primary, then the secondary voltage developed is:

A rod of length \(L\) is composed of two equal parts: half wood (mass \(m_w\)) and half brass (mass \(m_b\)). The moment of inertia about an axis through its centre and perpendicular to the rod is:

The maximum kinetic energy of photoelectrons coming out of a metal surface is \(10 \, \text{eV}\). The minimum voltage required to stop the emission of electrons from this metal surface is:

When a glass prism of refracting angle \(60^\circ\) is immersed in a liquid its angle of minimum deviation is \(30^\circ\). The critical angle of glass with respect to the liquid medium is:

Faraday constant:

A comb is run through wet hair on a rainy day, then:

The displacement-time graph of a particle moving along a straight line is shown in the figure. The acceleration-time graph of this particle is:

The energy required to break the covalent bond in a semiconductor is:

A body of mass \( m \) rises to a height \( h = \frac{R}{5} \) from the earth's surface, where \( R \) is the earth’s radius. If \( g \) is acceleration due to gravity at the earth’s surface, then the increase in potential energy is: