List of top Physics Questions asked in Guru Gobind Singh Indraprastha University Common Entrance Test

A force is applied to an object that is free to move. Which of the following statements is correct?
A rigid bar of mass 15 kg is supported symmetrically by three wires each 2 m long. Those at each end are of copper and the middle one is of iron. Determine the ratio of their diameters if each is to have the tension.
An astronaut is standing on an asteroid when he accidentally drops a wrench. He observes that the gravitational acceleration on the asteroid is 2.4 m/s². If he had thrown the wrench at an upward angle instead, he would have found the gravitational acceleration on the asteroid to be
The two-dimensional cube in the diagram below has charged objects placed at the corners as shown. An electron that is free to move is placed at the exact centre of the cube. In which direction will the electron move?
A body takes 5 min for cooling from 50°C to 40°C. Its temperature comes down to 33.33°C in the next 5 min. Temperature of the surroundings is
A TV tower has a height of 100 m. How much population is covered by TV broadcast, if the average population density around the tower is \( 1000 \, {km}^{-2} \) (radius of Earth = \( 6.4 \times 10^6 \, {m} \))?
The number of neutrons released during the fission reaction \[ {n} + ^{235} {U} \longrightarrow ^{133} {Sb} + ^{99} {Nb} + {neutrons is} \]
For a monoatomic gas, work done at constant pressure is W. The heat supplied at constant volume for the same rise in temperature of the gas is
For constructive interference to take place between two monochromatic light waves of wavelength \( \lambda \), the path difference should be
If the work done in stretching a wire by 1 mm is 2 J, the work necessary for stretching another wire of the same material but with double radius of cross-section and half the length by 1 mm is
A particle of mass \( m \) executes SHM with amplitude \( a \) and frequency \( v \). The average kinetic energy during its motion from the position of equilibrium to the end is
Two identical thin plano-convex glass lenses (refractive index 1.5) each having radius of curvature of 20 cm are placed with their convex surfaces in contact at the center. The intervening space is filled with oil of refractive index 1.7. The focal length of the combination is

A force \( F = (2 + x) \, \text{N} \) acts on a particle in the x-direction. The work done by this force during a displacement from \( x = 1.0 \, \text{m} \) to \( x = 2.0 \, \text{m} \) is?

When a hydrogen atom is raised from the ground state to the fifth state
A particle moves in one dimension. Its velocity is given by \( v(t) = c_2 t^2 + c_1 t + c_0 \) where \( c_1 \) and \( c_2 \) are constants. What is the acceleration of the particle at time \( t = 1 \)?
A light ray falls on a square glass slab as shown in the figure. The index of refraction of the glass, if total internal reflection is occur at vertical face, is equal to
A positive point charge is placed at the origin. There is an electric field \( E'(x) = 2, 2 + 3 \) that accelerates the Udder point charge along the x-axis. Determine the energy of the charge when it reaches the position \( x = 21 \).

A 4 cm thick layer of water covers a 6 cm thick glass slab. A coin is placed at the bottom of the slab and is being observed from the air side along the normal to the surface. Find the apparent position of the coin from 

A substance's specific heat is a function of its

There is a plane of uniform positive charge density \( \sigma \) parallel to the yz-plane and located at \( x = 2d \). A point charge \( q^+ \) is placed at the origin. Solve for the position \( x \) along the x-axis, where a positive test charge will have a net force of zero. 

A displacement vector is a
The difference between two audible frequencies is about 4 Hz. If one frequency and the speed of sound is 340 m/s, the other frequency might be about
At high altitude, a body at rest explodes into two equal fragments with one fragment receiving horizontal velocity of 10 m/s. Time taken by the two radius vectors connecting point of explosion of fragments to make 90° is
The diagrammatic representation of a heat engine above shows which of the following?
A simple harmonic wave of amplitude 8 units travels along the positive x-axis. At any given instant of time, for a particle at a distance of 10 cm from the origin, the displacement is +6 units and for a particle at a distance of 25 cm from the origin, the displacement is +4 units. Calculate the wavelength.