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

A magnet of magnetic moment 6 Am² weighs 65 g. The density of the material of the magnet is 6500 kg/m³. What is the magnetization?

A light string passing over a smooth light pulley connects two block of masses m₁ and m₂ (vertically). If the acceleration of the system is (3g/7), then the ratio of masses is ____________.

A magnetizing field of 5000 A/m produces a magnetic flux of 4 x 10^-5 Wb in an iron rod of cross-sectional area 0.4 cm². The permeability of the rod in Wb/A-m, is ______.

In the network shown cell E has internal resistance r and the galvanometer shows zero deflection. If the cell is replaced by a new cell of emf 2E and internal resistance 3r keeping everything else identical, then ______.

A small loop of area of cross-section 10^-6 m² is lying concentrically and coplanar inside a bigger loop of radius 0.628 m. A current of 20 A is passed in the bigger loop. The smaller loop is rotated about its diameter with an angular velocity `omega`. The magnetic flux linked with the smaller loop will be ____________.

A block of mass m, lying on a smooth horizontal surface, is attached to a spring (of negligible mass) of spring constant k. The other end of the spring is fixed, as shown in the figure. The block is initially at rest in its equilibrium position. If now the block is pulled with a constant force F, the maximum speed of the block is: ____________.

A rectangular loop of area 0.4 m² is lying in a magnetic field of 4 x 10^-2 tesla at an angle of 60° with the magnetic field. The magnetic flux passing through this loop will be ______.

A resistance of 5 `Omega` is connected in the left gap of a metre bridge and 15 `Omega` in the other gap. The position of the balancing point is ____________.

In energy band diagram of insulators, a band gap and the conduction band is respectively.

In following figure, a current of 1.4 A flows towards the bridge circuit. The current in 2 n resistor is ______.

When the kinetic energy of an electron is increased, the wavelength of the associated wave will ______.

When a ray of light enters a medium of refractive index µ, then it is observed that the angle of refraction is half the angle of incidence. The value of angle of incidence will be ____________.

SI Unit of Magnetization is ____________.

A body of mass m performs linear S.H.M. given by equation, x = P sin cot + Q sin`(omega"t" + pi/2)`. The total energy of the particle at any instant is ______.

Two parallel wires of equal lengths are separated by a distance of 3m from each other. The currents flowing through first and second wire is 3A and 4.5A respectively in opposite directions. The resultant magnetic field at the mid-point of both wire is (µ₀ = permeability of free space).

A cylindrical magnetic rod has length 5 cm and diameter 1 cm. It has uniform magnetization `5.3 xx 10^3 "A"/"m"^3`. Its net magnetic dipole moment is nearly `(pi = 22/7)`.

The dimensions of the relative magnetic permeability of the substance are ______.

The following figure shows the shape of part of a long string in which transverse waves are produced by attaching one end of the slring to tuning fork of frequency 300 Hz. The velocity of the waves is ____________.

An alternating e.m.f. of frequency 50 Hz is applied across series combination of resistor 'R' and inductance `(sqrt3/pi)`H. If the phase difference between applied e.m.f. and current 'I' is 60°, then the value of R is `[tan 60^circ = sqrt3, sin 60^circ = sqrt3/2, cos 60^circ = 1/2]`

Assertion: Susceptibility is defined as the ratio of intensity of magnetisation I to magnetic intensity H.

Reason: Greater the value of susceptibility, smaller the value of intensity of magnetisation I.