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

There are three needles 'N₁', 'N₂' and 'N₃' made of a ferromagnetic, a paramagnetic and a diamagnetic substance respectively. When a magnet is brought close to them, then it will ____________.

The materials having negative magnetic susceptibility are ____________.

The magnetic property of magnetic substance is associated with ____________.

The product of magnetic susceptibility (`chi`) and absolute temperature (T) is constant for a ____________.

Above the curie temperature the susceptibility of ferromagnetic substance varies ____________.

A sphere of gold when brought towards a powerful magnet experiences ____________.

Two parallel plates separated by a distance 'd' are kept at potential difference 'V' volt. A charge 'q' of mass 'm' enters in parallel plates with some velocity. The acceleration of the charged particle will be ______ 

The potential differences that must be applied across the parallel and series combination of 3 identical capacitors are such that the energy stored in them becomes the same. The ratio of potential difference in parallel to series combination is ______

Which of the following represents isothermal process?

A straight wire of length 50 cm carrying a current of 6 A is suspended in mid-air by a uniform magnetic field of 0.4 T (as shown in figure). The mass of the wire is ______.

(g = 10` "ms"^-2`)

A straight conductor of length 2 m moves in a uniform magnetic field of induction 2.5 x `10^-3` T with a velocity. of 4 m/s in a direction perpendicular to its length and also perpendicular to the field. The e.m.f. induced between the ends of the conductor is ______.

A straight wire of length 0.5 m and carrying current of 1.2A is placed in a uniform magnetic field of induction 2T. The magnetic field is perpendicular to the length of the wire. What is the force acting on the wire? sin 90° = 1

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

A domain in a ferromagnetic substance is in the form of a cube of side length 1 µm. If it contains 6 x 10¹⁰ atoms and each atomic dipole has a dipole moment of 7 x 10^-24 Am², then magnetization of the domain is ____________.

Intensities of two interfering waves are I₀ and 9I₀. The resultant intensity at a point at which waves meet with a phase difference of `pi/3` radian is ______.

Answer the following question regarding earth’s magnetism:

The angle of dip at a location in southern India is about 18°. Would you expect a greater or smaller dip angle in Britain?

A body is executing S.H.M. Its potential energy is E₁ and E₂ at displacements x and y respectively. The potential energy at displacement (x + y) is ______.

A simple pendulum of length 'L' is suspended from a roof of a trolley. A trolley moves in horizontal direction with an acceleration 'a'. What would be the period of oscillation of a simple pendulum?

(g is acceleration due to gravity)

Two waves are represented by y₁ = a sin `(omega"t" + pi/6)` and y₂ = a cos `omega"t"`. What will be their resultant amplitude?

A capacitor C₁ = 4µF is connected is series with another capacitor C₂ = 1µF. The combination is connected across d.c. source of 200 V. The ratio of potential across C₂ to that across C₁ is ______.