List of top Physics Questions asked in MHT CET

A current carrying circular coil of area \( A \) produces magnetic field \( B \) at the centre. The magnetic moment of the coil is ( \( \mu_0 \) = permeability of free space)

A ball falls in the downward direction from a height \( h \) with initial velocity \( V \). It collides with the ground, loses \( \frac{3}{4} \)th of energy and comes back to the same height. The initial velocity \( V \) is (g = acceleration due to gravity)

In phase modulation, according to the information signal, a parameter of the carrier wave which is varied, is

A particle starting from mean position performs linear S.H.M. Its amplitude is \( A \) and total energy is \( E \). At what displacement its kinetic energy is \( \frac{3E}{4} \)?

Two long thin parallel wires carrying current \( I \) separated by a distance \( d \) exert force \( F \) on one another. The distance between them is doubled and the current is decreased to \( \frac{1}{3} \). The force they exert on one another is

A spring has length \( L \) and force constant \( K \). It is cut into two springs of length \( L_1 \) and \( L_2 \) such that \( L_1 = N L_2 \) (N is an integer). The force constant of the spring of length \( L_1 \) is

A simple pendulum of length \( L \) has mass \( M \) and it oscillates freely with amplitude \( A \). At extreme position its potential energy is \( (g = \text{acceleration due to gravity}) \)

Two parallel plates separated by a distance \( d \) are kept at potential difference \( V \) volt. A charge \( q \) of mass \( m \) enters in parallel plates with some velocity. The acceleration of the charged particle will be

In vacuum, light takes time \( t \) to travel a distance \( d \) and it takes time \( T \) to travel a distance \( 5d \) in a denser medium. The critical angle of the given pair of media is

‘n’ number of waves are produced on a string in 0.5 second. Now the tension in a string is doubled (keeping radius constant). The number of waves produced in 0.5 second for the same harmonic will be

An electron in a stationary Bohr orbit of hydrogen atom jumps from 4th energy level to the ground state. The velocity that the photon acquired as a result of electron transition will be (h = Planck's constant, R = Rydberg's constant, m = mass of photon)

The initial pressure and volume of a gas is \( P \) and \( V \) respectively. First, by isothermal process, gas is expanded to volume \( 9V \), and then by adiabatic process its volume is compressed to \( V \). Then its final pressure is (Ratio of specific heat at constant pressure to constant volume \( \gamma = \frac{3}{2} \))

A bomb at rest explodes into three parts of same mass. The momentum of two parts is \( -3 \, P_i \) and \( 2 \, P_j \) respectively. The magnitude of the momentum of third part is

Two coherent monochromatic light beams of intensities 4I and 9I are superposed. The maximum and minimum possible intensities in the resulting beam are

The range of the voltmeter is \( V \) when \( 50 \, \Omega \) resistance is connected in series. Its range gets doubled when \( 500 \, \Omega \) resistance is connected in series. The resistance of the voltmeter is

When Young's double slit experiment is performed in liquid, 8\(^\text{th}\) bright band is found to lie where 5\(^\text{th}\) dark band lies in air. Refractive index of liquid is

The upward force of 10\(^5\) dyne due to surface tension is balanced by the force due to the weight of the water column and \( h \) is the height of water in the capillary. The inner circumference of the capillary is (Surface tension of water = \( 7 \times 10^{-2} \) N/m)

The resonance tube is filled with a liquid of density higher than that of water, then the resonating frequency

In Boolean algebra the output \( C \) and the inputs \( A \) and \( B \) are related as \( C = \overline{A \cdot B} \). The logic gate corresponding to this equation is

A stretched string under tension fixed at both ends vibrates in the 4th harmonic. The equation of the stationary wave is \( Y = 3 \sin(200\pi t) \cos(0.4x) \), where \( x \) and \( y \) are in cm and \( t \) in seconds. The length of the vibrating string is

In potentiometer experiment, for a given current, the balancing length for a cell is obtained at \( L \) cm. If the current through potentiometer wire is decreased, then the balancing length will

When light of wavelength \( \lambda \) is incident on a photosensitive surface, the stopping potential is \( V \). When light of wavelength \( 3\lambda \) is incident on the same surface, the stopping potential is \( \frac{V}{6} \). Threshold wavelength for the surface is

In non-uniform circular motion, the ratio of tangential acceleration to radial acceleration is \( (r = \) radius of circle, \( V = \) speed and \( \alpha = \) angular acceleration)

If \( f \) is the number of degrees of freedom of a molecule of a gas and ratio of molar specific heats of a gas, \( \gamma = 1 + \frac{2}{f} \) where \( \gamma = \frac{C_p}{C_v} \). The ratio of \( \gamma \) for monoatomic gas to \( \gamma \) for (rigid) diatomic gas is

A capacitor \( C_1 = 4 \, \mu F \) is connected in series with another capacitor \( C_2 = 1 \, \mu F \). The combination is connected across a d.c. source of 200 V. The ratio of potential across \( C_2 \) to that across \( C_1 \) is