List of top Physics Questions asked in MHT CET

The magnetic field intensity 'H' at the centre of a long solenoid having 'n' turns per unit length and carrying a current 'I', when no material is kept in it, is

When a d.c. voltage of 200 V is applied to a coil of self-inductance $\left(\frac{2\sqrt{3}}{\pi}\right)$ H, a current of 1 A flows through it. But by replacing d.c. source with a.c. source of 200 V, the current in the coil is reduced to 0.5 A. Then the frequency of a.c. supply is

In Young's double slit experiment, the '$\text{n}^{\text{th}}$' maximum of wavelength '$\lambda_1$' is at a distance '$y_1$' from the central maximum. When the wavelength of the source is changed to '$\lambda_2$', the $(2n)^{\text{th}}$ maximum is at a distance of '$y_2$' from its central maximum. The ratio $\frac{y_1}{y_2}$ is

Two particles P and Q performs S.H.M. of same amplitude and frequency along the same straight line. At a particular instant, maximum distance between two particles is 2 a. The initial phase difference between them is $\left[ \sin^{-1}\left(\frac{1}{2}\right) = \cos^{-1}\left(\frac{1}{2}\right) = \frac{\pi}{4} \right]$

If the charge to mass ratio of an electron is 'A' C/kg, then the gyromagnetic ratio of an orbital electron in C/kg is

A parallel plate capacitor filled with oil of a dielectric constant 3 between the plates has capacitance 'C'. If the oil is removed, then the capacitance of the capacitor will be

A perfectly black body emits a radiation at temperature '$T_1$' K. If it is to radiate at 16 times this power, its temperature '$T_2$' K should be

Two conducting wire loops are concentric and lie in the same plane. The current in the outer loop is clockwise and increasing with time. The induced current in the inner loop is

A mass '$m_1$' is suspended from a spring of negligible mass. A spring is pulled slightly in downward direction and released, mass performs S.H.M. of period '$T_1$'. If the mass is increased by '$m_2$', the time period becomes '$T_2$'. The ratio $\frac{m_2}{m_1}$ is

A double slit experiment is immersed in water of refractive index 1.33. The slit separation is 1 mm and the distance between slit and screen is 1.33 m. The slits are illuminated by a light of wavelength \(6300 \, \text{Å}\). The fringe width is

Two small drops of mercury each of radius '\( R \)' coalesce to form a large single drop. The ratio of the total surface energies before and after the change is

A particle executes linear S.H.M. The mean position of oscillation is at the principal axis of a convex lens of focal length 8 cm. The mean position of oscillation is at 14 cm from the lens with amplitude 1 cm. The amplitude of oscillating image of the particle is nearly

A series combination of resistor 'R' and capacitor 'C' is connected to an a.c. source of angular frequency 'ω'. Keeping the voltage same, if the frequency is changed to \(\frac{ω}{3}\) the current becomes half of the original current. Then the ratio of capacitive reactance and resistance at the former frequency is

A bomb is dropped by an aeroplane flying horizontally with a velocity 200 km/hr and at a height of 980 m. At the time of dropping a bomb, the distance of the aeroplane from the target on the ground to hit directly is \( (g = 9.8 \, \text{m/s}^2) \)

On a photosensitive surface, if the intensity of incident radiation is increased, the stopping potential

A particle of mass 'm' is kept at rest at a height \( 3R \) from the surface of earth, where 'R' is radius of earth and 'M' is the mass of earth. The minimum speed with which it should be projected, so that it does not return back is ( \( g = \) acceleration due to gravity on the earth's surface)

The velocity of a small ball of mass '\( M \)' and density '\( d_1 \)' when dropped in a container filled with glycerine becomes constant after some time. If the density of glycerine is '\( d_2 \)', the viscous force acting on the ball is ( \( g = \) acceleration due to gravity )

A coil of radius 'r' is placed on another coil (whose radius is 'R' and current through it is changing) so that their centres coincide. (\( R > r \)). If both coplanar, then the mutual inductance between them is proportional to

\(\lambda_1\) is the wavelength of series limit of Lyman series, \(\lambda_2\) is the wavelength of the first line of Lyman series and \(\lambda_3\) is the series limit of the Balmer series. Then the relation between \(\lambda_1\), \(\lambda_2\) and \(\lambda_3\) is

A sphere of mass 25 gram is placed on a vertical spring. It is compressed by 0.2 m using a force 5 N. When the spring is released, the sphere will reach a height of \( g = 10 \, \text{m/s}^2 \)

'F' is the force between the two identical charged particles placed at a distance 'Y' from each other. If the distance between the charges is reduced to half the previous distance then force between them becomes

In biprism experiment, 21 fringes are observed in a given region using light of wavelength 4800 Å. If light of wavelength 5600 Å is used, the number of fringes in the same region will be

In fundamental mode, the time required for the sound wave to reach upto the closed end of pipe filled with air is \( t \) second. The frequency of vibration of air column is

What is susceptibility of a medium, if its relative permeability is 0.85?

Two wires 'A' and 'B' of equal length are connected in left and right gap respectively of meter bridge, null point is obtained at 40 cm from the left end. Diameters of the wires 'A' and 'B' are in the ratio 3 : 1 respectively, the ratio of specific resistance of 'A' to that of 'B' is