HSC Science (General) इयत्ता १२ वी - Maharashtra State Board Question Bank Solutions for Physics

Define moment of inertia. State its SI unit and dimensions.

At which position of the plane of the rotating coil with the direction of magnetic field, the e.m.f. induced in the coil is maximum?

State Brewster’s law and show that when light is incident at polarizing angle the reflected and refracted rays are mutually perpendicular to each other.

Soft iron is used to make the core of the transformer because of its ______.

Which property of soft iron makes it useful for preparing electromagnet?

What should be retentivity and coercivity of permanent magnet?

Answer in brief.

Explain one application of electromagnet.

Compare resistance and reactance.

Answer in brief:

What are harmonics and overtones?

State two applications of Pascal's law.

Give an example of some familiar process in which heat is added to an object, without changing its temperature.

Answer in brief.

Why should a Carnot cycle have two isothermal two adiabatic processes?

An ideal gas is taken through an isothermal process. If it does 2000 J of work on its environment, how much heat is added to it?

A sound wave in a certain fluid medium is reflected at an obstacle to form a standing wave. The distance between two successive nodes is 3.75 cm. If the velocity of sound is 1500 m/s, find the frequency.

Two sound waves travel at a speed of 330 m/s. If their frequencies are also identical and are equal to 540 Hz, what will be the phase difference between the waves at points 3.5 m from one source and 3 m from the other if the sources are in phase?

A pipe closed at one end can produce overtones at frequencies 640 Hz, 896 Hz, and 1152 Hz. Calculate the fundamental frequency.

Find the fundamental, first overtone, and second overtone frequencies of a pipe, open at both the ends, of length 25 cm if the speed of sound in air is 330 m/s.

A pipe open at both the ends has a fundamental frequency of 600 Hz. The first overtone of a pipe closed at one end has the same frequency as the first overtone of the open pipe. How long are the two pipes?

(Given: v = 330 m/s)

A string 1m long is fixed at one end. The other end is moved up and down with frequency of 15 Hz. Due to this, a stationary wave with four complete loops gets produced on the string. Find the speed of the progressive wave which produces the stationary wave.
[Hint: Remember that the moving end is an antinode.]

A violin string vibrates with fundamental frequency of 440Hz. What are the frequencies of the first and second overtones?