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

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

A common emitter amplifier is designed with n-p-n transistor (α = 0.99). The input impedance is 1 kΩ and the load is 10 kΩ. The voltage gain will be ______

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 ______

The condition to convert an amplified signal into an oscillating signal is ______

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 ______.

A transistor having α = 0.8 is connected in common emitter configuration. When the base current changes by 6 mA, then the change in collector current is ______.

A uniform metal wire has length L, mass M and density p. It is under tension T and v is the speed of transverse wave along the wire. The area of cross-section of the wire is ______.

In a metre bridge, the gaps are closed by two resistances P and Q and the balance point is obtained at 40 cm. When Q is shunted by a resistance of 10 Ω, the balance point shifts to 50 cm. The values of P and Q are ______

A transverse wave is propagating on the string. The linear density of a vibrating string is 10^-3 kg/m. The equation of the wave is Y = 0.05 sin (x + 15 t) where x and Y are measured in metre and time in second. The tension force in the string is ______,