List of top Physics Questions asked in MHT CET

Light of wavelength \(\lambda\) strikes a photoelectric surface and electrons are ejected with energy \(E\). If the wavelength is changed to \(\lambda'\), the energy becomes twice the original value. Which one of the following relations is true for \(\lambda\) and \(\lambda'\)?

The size of the real image produced by a convex lens of focal length \(F\) is \(m\) times the size of the object. The image distance from the lens is

The displacement of the particle at a distance \(x\) from the origin is given by \(Y = A \sin \omega \left(\dfrac{x}{v} - k\right)\), where \(\omega\) is the angular velocity and \(v\) is the linear velocity. The dimensions of \(k\) are

When a certain length of wire is turned into one circular loop, the magnetic induction at the centre of the coil due to current \(I\) is \(B_1\). If the same wire is turned into four loops to make a circular coil, the magnetic induction at the centre of this coil is \(B_2\) for the same current. Then the relation between \(B_2\) and \(B_1\) is

Moment of inertia of a rod about an axis passing through its centre and perpendicular to its length is \(I_1\). The same rod is bent into a ring and its moment of inertia about the diameter is \(I_2\). Then the ratio \( \dfrac{I_2}{I_1} \) is

In experiment of photoelectric effect, the stopping potential for incident yellow light of wavelength \(5890\text{\AA}\) is 4 V. If the yellow light is replaced by blue light of wavelength \(4000\text{\AA}\), the stopping potential is

A stone is tied at the end of a rope of length 1 m and whirled in a vertical circle. The ratio of velocity at the highest point to the lowest point will be

The length and diameter of a metal wire used in a sonometer is doubled. The fundamental frequency will change from \(n\) to

The length \(L\) and diameter \(D\) are given for four wires of the same material. They are stretched by the same load. Which wire will elongate more?

The mutual inductance between two coils is 0.09 H. If the current in the primary coil changes from 0 to 20 A in 0.006 s, the e.m.f. induced in the secondary coil is

An electric lamp connected in series with a capacitor and an a.c. source is glowing with certain brightness. On reducing the capacitance and frequency, the brightness of the lamp respectively

A disc rolls down a smooth inclined plane without slipping. The inclined plane makes an angle of \(60^\circ\) with the vertical. The linear acceleration of the disc along the inclined plane is (Given: \(g\) is acceleration due to gravity, \(\sin 30^\circ = \cos 60^\circ = \frac{1}{2}\), \(\sin 60^\circ = \cos 30^\circ = \frac{\sqrt{3}}{2}\))

A particle of mass \(m\) collides with another stationary particle of mass \(M\). The particle of mass \(m\) stops just after collision. The coefficient of restitution is

A particle executes linear S.H.M. along 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 the oscillating image of the particle is nearly

On mixing a highly soluble impurity in water, the surface tension \(T\) and angle of contact \(\theta\)

A wire has a length of 2 m and resistance of \(10\,\Omega\). It is connected in series with a resistance of \(990\,\Omega\) and a cell of e.m.f. 2 V. The potential gradient along the wire will be

A cricket ball of mass \(150\,\text{g}\) moving with a velocity of \(12\,\text{m/s}\) is turned back with a velocity of \(20\,\text{m/s}\) on hitting the bat. The force of the blow lasts for \(0.01\,\text{s}\). The force exerted on the ball by the bat is

Choose the correct statement. In case of insulators,

The given circuit is a balanced Wheatstone’s bridge. The value of resistance \(x\) is

The output \(Y\) in the following logic circuit will be ONE only if

The condition for observing Fraunhofer diffraction pattern from an obstacle is that the light wavefront incident on it must be

What should be the length of antenna for a carrier wave of frequency \(6 \times 10^{8}\,\text{Hz}\)? (Given: velocity of light \(c = 3 \times 10^{8}\,\text{m/s}\))

A small quantity of paramagnetic liquid is taken in a watch-glass and kept on two dissimilar magnetic poles. The liquid

A disc of moment of inertia \(I_1\) is rotating with angular velocity \(\omega_1\) about an axis perpendicular to its plane passing through its centre. If another disc of moment of inertia \(I_2\) about the same axis is gently placed over it, then the new angular velocity of the combined disc will be

A particle is moving along a circular path of radius \(r\) with velocity \(v\). The magnitude of average acceleration after half revolution is