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

In an oscillator, for sustained oscillations, Barkhausen criterion is Aβ equal to ______.

(A = voltage gain without feedback and β feedback factor)

Two wires having same length and material are stretched by same force. Their diameters are in the ratio 1: 3. The ratio of strain energy per unit volume for these two wires (smaller to larger diameter) when stretched is ______.

In the current carrying conductor (AOCDEFG) as shown, the magnetic induction at point O is ______.

(R₁ and R₂ are radii of CD and EF respectively. l = current in the loop, μ₀ = permeability of free space)

A particle moves in SHM such that its acceleration is a = -px, where x is the displacement of a particle from the equilibrium position and p is a constant. The period of oscillation is ______.

The charge will flow through a galvanometer of resistance 200Ω connected to a 400Ω circular coil of 1000 turns wound on a wooden stick 20 mm in diameter, if a magnetic field B = 0.012 T parallel to the axis of the stick decreased suddenly to zero, is near ______.

A ring and a disc of different masses are rotating with the same kinetic energy. If we apply a retarding torque τ on the ring, it stops after completing n revolution in all. If the same torque is applied to the disc, how many revolutions would it complete in all before stopping?

10 m long uniform wire of resistance 2Ω per metre is connected in series with a battery of emf 3 V and a resistance 10Ω. The potential gradient along the wire (in V/m) is ______.

Which of the following statements is correct for any thermodynamic system?

If K_S and K_P respectively are effective spring constants in series and parallel configurations of springs as shown in the figure. Find `K_S/K_P`.

(i)	(ii)

What is the equivalent resistance across points A and B in the circuit given below?

Two circular coils A and B are made from the same wire but the radius of coil A is twice that of coil B. If the magnetic fields at their centres are the same, then the ratio of potential differences applied across A to that of B is ______.

In non-uniform circular motion, the ratio of tangential to radial acceleration is (r = radius, a = angular acceleration and v = linear velocity)

A body slides down a smooth inclined plane having angle θ and reaches the bottom with velocity v. If a body is a sphere, then its linear velocity at the bottom of the plane is

If the angle of dip at places A and Bare 30° and 45° respectively, then the ratio of horizontal component of earth's magnetic field at A to that at B will be
`[sin 45^circ = cos 45^circ = 1/sqrt2, sin  pi/6 = 1/2, cos  pi/6 = sqrt3/2]`

The escape velocity of a body depends upon mass as ______ 

When gas is m thermal equilibrium, its molecules have ______

A spherical rubber balloon carries a charge, uniformly distributed over the surface. As the balloon is blown up and increases in size, the total electric flux coming out of the surface ______.

A particle of mass m is performing UCM along a circle of radius r. The relation between centripetal acceleration a and kinetic energy E is given by

Faraday's law is the consequence of conservation of ______

Two particles A and B are located at distances r_A and r_B respectively from the centre of a rotating disc such that r_A > r_B. In this case, if angular velocity ω of rotation is constant, then ______