HSC Science (Computer Science) इयत्ता १२ वी - Maharashtra State Board Important Questions

On what, the values of absorption coefficient, reflection coefficient, and transmission coefficient depend, in addition to the material of the object on which the radiation is an incident? 

Above what temperature, all bodies radiate electromagnetic radiation? 

Show the graphical representation of radiant power of a black body per unit range of wavelength as a function of wavelength.

1000 calories of radiant heat are incident on a body. If the body absorbs 400 calories of heat, find the coefficient of emission of the body. 

Explain the construction and working of Ferry’s black body.

Derive an expression for the pressure exerted by a gas on the basis of the kinetic theory of gases.

The period of a conical pendulum in terms of its length (l), semi-vertical angle (θ) and acceleration due to gravity (g) is ______.

Answer in brief.

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

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

Heating a gas in a constant volume container is an example of which process?

What is a thermodynamic process?

Explain the cyclic process. 

3 mole of a gas at temperature 400 K expands isothermally from an initial volume of 4 litres to a final volume of 8 litres. Find the work done by the gas. (R = 8.31 J mol^-1 K^-1)  

Explain the thermodynamics of the isobaric process.  

A particle is performing simple harmonic motion with amplitude A and angular velocity ω. The ratio of maximum velocity to maximum acceleration is ______.

Define second’s pendulum.

Differentiate between free and forced vibrations.

Discuss different modes of vibrations in an air column of a pipe open at both the ends.

Define surface tension.