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

Lenz's law obeys the principle of ______ conservation.

Alternating current cannot be measured by D.C. ammeter because ____________.

An alternating voltage e = `200sqrt2` sin(100 t) volt is connected to a 1 µF capacitor through a.c. ammeter. The reading of the ammeter is ______

Two waves represented by the following equations are travelling in the same medium 

`y_1 = 5 sin 2pi(75t - 0.25 x)`

`y_2 = 10 sin 2pi(150t - 0.50 x)`

The intensity ratio `"I"_1/"I"_2` of the two waves is ______

For a body moving with constant speed in a horizontal circle, which of the following remains constant?

An AC circuit contains resistance of 12Q and inductive reactance 5Q. The phase angle between current and potential difference will be ______.

The temperature of an ideal gas, initially at 27°C, is raised by 12°C. The rms velocity of the gas molecules will, ______ 

The Gyromagnetic ratio of the electron revolving in a circular orbit of a hydrogen atom is 8.8 x 10¹⁰ C kg^-1. What is the mass of the electron? (Given charge of the electron = 1.6 x 10-19 C.) 

The angle made by orbital angular momentum of electron with the direction of the orbital magnetic moment is ______.

In a certain region of space with volume 0.2 m³ , the electric potential is found to be 5V throughout. The magnitude of electric field in this region is: ____________.

Dimensions of Gyromagnetic ratio are _________.

In a spring-block system, length of the spring is increased by 5%. The time period will ____________.

What will be the current flowing through the 6 kΩ resistor in the circuit shown, where the breakdown voltage of the Zener is 6V?

The rms value of current in a 50 Hz AC circuit is 6 A. The average value of AC current over a cycle is ____________.

A particle is performing a linear simple harmonic motion of amplitude 'A'. When it is midway between its mean and extreme position, the magnitudes of its velocity and acceleration are equal. What is the periodic time of the motion?

An electron revolving in a circular orbit of radius 'r' with velocity 'v' and frequency v has orbital magnetic moment 'M'. If the frequency of revolution is tripled then the new magnetic moment will be ____________.

The equation of standing wave is y = a cos kx sin `omega"t"`. Which one of following graphs is for the wave at t = T/4?

The critical angle for light going from medium 'x' to medium 'y' is 'θ'. The speed of light in medium 'x' is 'v_x'. The speed of light in medium 'y' is ______.

An alternating voltage is given by E = 100 sin`(omega + pi/6)"V"`. The voltage will be maximum for the first time when is ______. [T = periodic time]

In half-wave rectifier, the RMS value of A.C. component of the wave is ____________.