MAH-MHT CET (PCM/PCB) entrance exam Question Bank Solutions for Physics

When monochromatic light of frequency v₁ falls on a metal surface, the stopping potential required is found to be V₁. If the radiation of frequency v₂ is incident on the surface, the stopping potential required V₂ is ______. (v₂ > v₁)

A semicircular wire of radius a having λ as charge per unit length is shown in the figure. Find the electric potential at the centre of the semicircular wire. 

The magnetic susceptibility of a paramagnetic material at - 73°C is 0.0075. Its value at - 173°C will be ______.

A batsman hits a ball of mass 0.2 kg straight towards the bowler without changing its initial speed of 6 m/s. What is the impulse imparted to the ball?

A sound wave has a frequency of 500 Hz and a velocity of 350 m/s. The distance between the two particles having a phase difference of 60° is near ______

In conversion of moving coil galvanometer into an ammeter of required range, the resistance of ammeter, so formed is ______.
[S = shunt and G = resistance of galvanometer]

The current which flows in a galvanometer of Wheatstone bridge is directly proportional to ______

With resistances P and Q placed in the left and right gaps of a metre bridge, the balance point divides the wire in the ratio of 1/3. When P and Q are increased by 40 n each. the balance point divides the wire in the ratio of 3/5. The values of P and Q will be respectively, ______ 

Two sinusoidal plane waves of the same frequency having intensities I₀ and 4I₀ are travelling in the same direction. The resultant intensity at a point at which waves meet with a phase difference of zero radians is ______

Two waves of the same amplitude superimpose to produce two beats per second. What is the ratio of minimum loudness to that of one of the waves?

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

An iron rod is placed parallel to magnetic field of intensity 2000 A/m. The magnetic flux through the rod is 6 × 10⁻⁴ Wb and its cross-sectional area is 3cm². The magnetic permeability of the rod in `"Wb"/("A" - "m")` is ____________.

In a Wheatstone bridge, when the potentials at points B and D are the same, then the current through the galvanometer ______

In a metre bridge experiment, the null point is obtained at 20 cm from one end of the wire when resistance X is balanced against another resistance Y. If X < Y, then where will be the new position of the null point from the same end, if one decides to balance a resistance of 4X against Y?

An electron moves in a circular orbit with uniform speed v. It produces a magnetic field B at the centre of the circle. The radius of the circle is [µ₀ = permeability of free space, e = electronic charge]

A light beam is incident at an angle twice the angle of refraction. The angle of refraction is ______. 

The magnetic susceptibility is given by ______

Monochromatic light of wavelength λ is incident on the plane reflecting surface. After reflection, its wavelength will be ______

A steel wire of length I has a magnetic moment M. It is then bent into a semicircular arc. The new magnetic moment is ______.

N number of balls of mass m kg moving along positive direction of X-axis, strike a wall per second and return elastically. The velocity of each ball is u m/s. The force exerted on the wall by the balls in newton, is ______.