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

Let n_h and n_e be the number of holes and conduction electrons respectively in a semiconductor. Then ______.

A horizontal rod of mass 20 g and length 40 cm is placed on a smooth plane inclined at an angle of 60° with the horizontal, with the length of the rod parallel to the edge of the inclined plane. A uniform magnetic field of induction B is applied vertically downwards. If the current through the rod is 1.73 ampere, then the value of B for which the rod remains stationary on the inclined plane is ____________.

The phase difference between the instantaneous velocity and acceleration of a particle executing S.H.M is ____________.

If 'α' and 'β' are the maximum velocity and maximum acceleration respectively, of a particle performing linear simple harmonic motion, then the path length of the particle is _______.

The two waves are represented by Y₁ = `10-2 sin [50"t" + x/25 + 0.3]`m and Y₂ = `10^-2 cos [50"t" + x/25]`m where x is in metre and time in second. The phase difference between the two waves is nearly _________.

Two waves are represented by the equations `"y"_1, = "a sin" (omega"t"+ "kx" + 0.57)` m and `"y"_2, = "a cos" (omega"t"+ "kx")` m, where x is in metre and t in second. The phase difference between them is ____________.

The distance covered by a particle undergoing SHM in one time period is (amplitude = A) ____________.

Which of the following represents the acceleration versus displacement graph of SHM?

A particle executing S.H.M. has amplitude 0.01 m and frequency 60 Hz. The maximum acceleration of the particle is ____________.

The electric potential V at any point O (x, y, z all in metres) in space is given by V = 4x² volt. The electric field at the point (1 m, 0, 2m) in volt/metre is ____________.

A sonometer wire resonates with a given tuning fork forming standing wave with 5 antinodes between two bridges when mass of 9 kg is suspended from the wire. When mass 'M' is suspended from the wire, with same fork and same length between two bridges 3 antinodes are formed. Mass M is ______.

A body of mass 5 g is in S.H.M. about a point with amplitude 10 cm. Its maximum velocity is 100 cm/s. Its velocity will be 50 cm/s at a distance of, ____________.

The amplitude of a wave represented by equation `"y" = 1/(sqrt"a")  "sin"  omega"t" pm 1/(sqrt"b") "cos"  omega"t"` will be ____________.

In a semiconductor, the number of holes and number of free electrons are represented as 'n_h' and 'n_e' respectively. Which one of the following statements is TRUE for the semiconductor?

The displacement of a particle is 'y' = 2 sin `[(pit)/2 + phi]`, where 'y' is cm and 't' in second. What is the maximum acceleration of the particle executing simple harmonic motion? 

(Φ = phase difference)

The maximum speed of a particle in S.H.M. is 'V'. The average speed is ______ 

The length of the second's pendulum is decreased by 0.3 cm when it is shifted from place A to place B. If the acceleration due to gravity at place A is 981 cm/s², the acceleration due to gravity at place B is ______ (Take π² = 10)

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?