COMEDK 2021

For an ideal gas, coefficient of volume expansion is given by

Which of the following is not a green house gas?

The collision of the molecules of an ideal gas is taken as

The average energy associated with a monoatomic molecule is

Carnot cycle of an engine is given below

Total work done by the gas in one cycle is

The motion of a particle of mass \(m\) is described by \(y = ut + g{t^2}\). The force acting on the particle will be

A bar magnet is oscillating in the earth's magnetic field with a period T. What happens to its period and motion, if its mass is quadrupled?

The relative permeability of iron is 6000. Its magnetic susceptibility is

Which graph shows the correct \(v\) - \(x\) graph of a freely falling body?

The displacement \(x\) of a particle varies with time \(t\), \(x=ae^{-pt}+be^{qt}\), where a, b, p and q are positive constant. The velocity of the particle will

The angle of projection with the horizontal in terms of maximum height attained and horizontal range is given by

Two particles of masses \(m_1=m,m_2=2m\) and charges \(q_1=q,q_2=2q\) entered into uniform magnetic field. Find \(F_1/F_2\) (force ratio).

A long solenoid has 20 turns cm\(^{-1}\). The current necessary to produce a magnetic field of 20 mT inside the solenoid is approximately

A constant current flows from A to B as shown in the figure. What is the direction of current in the circle?

Two converging lenses of focal length 20 cm and 40 cm are placed in contact. The effective power of the combination is

The magnifying power of a telescope is 9. When it is adjusted for parallel rays, the distance between the objective and eyepiece is 20 cm. The focal length of lenses are

Newton's second law of rotational motion of a system particles having angular momentum L is given by

Find the logic gate, when both the inputs are high but the output is low and vice-versa.

What is the minimum band-gap of the LED diode?

The function \(y = \log \omega t\) can represent

Two spring of force constant \(k_1\) and \(k_2\) are configured as the figure given below

The angular frequency of this configuration is

Which of the following statement is incorrect?

Which of the following technique is not used for measuring small time intervals?

The relative errors in the measurement of two lengths 1.02 cm \(\pm\) 0.01 cm and 9.89 cm \(\pm\) 0.01 cm is

An unpolarised beam of intensity I\(_0\) is incident on a pair of nicols making an angle of 60\(^\circ\) with each other. The intensity of light emerging from the pair is

In Young's double slit experiment with sodium vapour lamp of wavelength 589 nm and slit 0.589 mm apart, the half angular width of the central maxima is

The displacement of a wave is given by
\(y = 20\cos (\omega t + 4z)\)
The amplitude of the given wave is

If frequencies are \((\nu-1)\) and \((\nu+2)\), then find the value of beats.

Two masses of 1g and 9g are moving with equal kinetic energy. The ratio of magnitude of their momentum is

For motion under central forces, which quantity will be conserved?