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

Thomson's atomic model could not explain ____________ successfully.

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]`

For a common emitter configuration, if 'α' and 'β' have their usual meanings, the correct relationship between 'α' and 'β' is ______.

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.

The rotating vector that represents a quality varying sinusoidally with time is a ____________.

The potential difference between the points A and B in the electric circuit shown is ______.

If velocity of sound in a gas is 360 m/s and the distance between a compression and the nearest rarefaction is 2 m, then the frequency of sound is ____________.

Which among the following resistances can be determined by a metre bridge?

What is the magnetization of a bar magnet having length 5 cm and area of cross section 2 cm²? (M = 1 Am²)

In a silicon transistor, a change of 7.89 mA in the emitter current if produces a change of 7.8 mA in the collector current, then the base current must change by ____________.

In a transistor, a change of 8.0 mA in the emitter current produces a change of 7.8 mA in the collector current. Then change in the base current is ____________.

A body of mass 0.5 kg is rotating in a vertical circle of radius 2 m. What will be the difference in its kinetic energy at the top and bottom of the circle? (Take g = 9.8 m/s²)

In the measurement of a resistance by the Wheatstone bridge, the known and the unknown resistance are interchanged to eliminate ____________.

A transistor when connected in common emitter mode has a ____________.

In a closed pipe, the note of fundamental frequency can be produced if the length of the air column is equal to ____________.

A pnp transistor is used in common-emitter mode. If a change of 40 µA in base current brings a change of 2 µA in collector current with 0.04 V in base-emitter voltage, then the input resistance is ____________.

The current gain `alpha` of a transistor is 0.95. The change in collector current corresponding to a change of 0.4 mA in the base current in a common emitter arrangement is ______.

If M_z = magnetization of a paramagnetic sample, B external magnetic field, T = absolute temperature, C = curie constant then according to Curie's law in magnetism, the correct relation is ______.

In insulators, ____________.