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

Apparent frequency of the sound heard by a listener is less than the actual frequency of sound emitted by source. In this case _______.

(A) listener moves towards source

(B) source moves towards listener

(C) listener moves away from the source.

(D) source and listener move towards each other.

Write notes on Nuclear fission

Write notes on Nuclear fusion

Show that motion of bob of the pendulum with small amplitude is linear S.H.M. Hence obtain an expression for its period. What are the factors on which its period depends?

Show that, under certain conditions, simple pendulum performs the linear simple harmonic motion.

State any four applications of Doppler effect

If the particle starts its motion from mean position, the phase difference between displacement and acceleration is ______.

Distinguish between centripetal and centrifugal force.

What is the decrease in weight of a body of mass 500 kg when it is taken into a mine of depth 1000 km? (Radius of earth R = 6400 km, g = 9.8 m/s²)

Calculate the internal energy at 298K for the formation of one mole of ammonia, if the enthalpy change at constant pressure is – 42.0 kJ mol^-1.

(Given: R = 8.314 J K^-1 mol^-1)

Define diathermanous substance.

A gas contained in a cylinder surrounded by a thick layer of insulating material is quickly compressed has there been a transfer of heat?

Answer in brief:

A gas contained in a cylinder surrounded by a thick layer of insulating material is quickly compressed has work been done?

Why are multiple colours observed over a thin film of oil floating on water? Explain with the help of a diagram.

Answer in brief:

Explain what is the optical path length. How is it different from actual path length?

What is meant by coherent sources?

Answer in brief.

What sets the limits on the efficiency of a heat engine?

Answer in brief:

In Young's double-slit experiment what will we observe on the screen when white light is incident on the slits but one slit is covered with a red filter and the other with a violet filter? Give reasons for your answer.

Draw a p-V diagram and explain the concept of positive and negative work. Give one example each.

An ideal monoatomic gas is adiabatically compressed so that its final temperature is twice its initial temperature. What is the ratio of the final pressure to its initial pressure?