HSC Science (Computer Science) १२ वीं कक्षा - Maharashtra State Board Question Bank Solutions

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?

Describe Young's double-slit interference experiment and derive conditions for occurrence of dark and bright fringes on the screen. Define fringe width and derive a formula for it.

What are the conditions for obtaining a good interference pattern? Give reasons.

What are the two methods for obtaining coherent sources in the laboratory?

The figure shows the V-T diagram for one cycle of a hypothetical heat engine which uses the ideal gas. Draw the p-V diagram diagram of the system.

A double-slit arrangement produces interference fringes for sodium light (λ = 589 nm) that are 0.20° apart. What is the angular fringe separation if the entire arrangement is immersed in water (n = 1.33)?

The intensity of the light coming from one of the slits in Young's experiment is twice the intensity of the light coming from the other slit. What will be the approximate ratio of the intensities of the bright and dark fringes in the resulting interference pattern?