List of top Questions asked in COMEDK UGET- 2021

When the speed of light becomes \( \frac{2}{3} \) of its present value, then the energy released in a given atomic explosion would
The magnifying power of a telescope is 9. When adjusted for parallel rays, the distance between the objective and eyepiece is 20 cm. The focal lengths of lenses are:
According to Pascal’s law, pressure in a fluid at rest is the same at all points, if
Newton’s second law of rotational motion of a system of particles having angular momentum \( L \) is given by
A constant potential energy of a satellite is given as \[ PE = r \cdot KE \] where PE = potential energy and KE = kinetic energy. The value of \( r \) will be
Kepler’s second law of planetary motion corresponds to
A wire is stretched to double of its length. The strain is
A long solenoid has 20 turns cm\(^{-1}\). The current necessary to produce a magnetic field of 20 mT inside the solenoid is approximately
If an electron in hydrogen atom jumps from an orbit of level \( n = 3 \) to an orbit at level \( n = 2 \), emitted radiation has a frequency of
\( (R = \text{Rydberg’s constant}, \ c = \text{speed of light}) \)
Within the elastic limit, the corresponding stress is known as
The resistance of a wire is \( R \) ohm. If it is melted and stretched to \( n \) times its original length, its new resistance will be
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
The collision of the molecules of an ideal gas is taken as
The average energy associated with a monoatomic molecule is
Find the logic gate, when both the inputs are high the output is low and vice-versa.
What is the minimum band-gap of the LED diode?
If frequencies are \( (v - 1) \) and \( (v + 2) \), then find the value of beats.
Work done in moving a charge of 25 C is 50 J. Calculate the potential difference between two points.
The correct arrangement in increasing order of wavelength of X-rays, UV rays, and microwaves is
The velocity of the proton is one-fourth the velocity of the electron. What is the ratio of the de-Broglie wavelength of an electron to that of a proton?
Two particles of masses \( m_1 = m \), \( m_2 = 2m \) and charges \( q_1 = q \), \( q_2 = 2q \) entered into uniform magnetic field. Find \( \frac{F_1}{F_2} \) (force ratio).
For an ideal gas, coefficient of volume expansion is given by
For the same resonant frequency, if \( L \) is changed from \( L \) to \( \frac{L}{3} \), then capacitance should change from \( C \) to
The angle of projection with the horizontal in terms of maximum height attained and horizontal range is given by
The formula of capacitative reactance is