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

What is interference?

Describe geometry of the Young’s double slit experiment with the help of a ray diagram. What is fringe width? Obtain an expression of it. Write the conditions for constructive as well as destructive interference. 

What are coherent sources of light? 

Explain constructive and destructive interference with the help of a diagram?

The magnetic dipole moment of the current loop is independent of ______  

State the orientation of magnetic dipole with respect to a magnetic field, which possesses maximum magnetic potential energy.

Prove that the frequency of beats is equal to the difference between the frequencies of the two sound notes giving rise to beats.

Define Impedance.

Two tuning forks of frequencies 320 Hz and 340 Hz are sounded together to produce a sound wave. The velocity of sound in air is 326.4 m/s. Calculate the difference in wavelengths of these waves.

In a double-slit experiment, the optical path difference between the waves coming from two coherent sources at a point P on one side of the central bright is 7.5 µm and that at a point Q on the other side of the central bright fringe and 1.8 µm. How many bright and dark fringes are observed between points P and Q if the wavelength of light used is 600 nm?

If beat frequency is 2 Hz, what is the time interval between success waxings?

Define athermanous substance.

Draw a neat labelled P - V diagram for a typical heat engine. 

The thermal efficiency of a heat engine is 25%. If in one cycle the heat absorbed from the hot reservoir is 50000 J, what is the heat rejected to the cold reservoir in one cycle?

A sonometer wire under a tension of 40 N vibrates in unison with a tuning fork of frequency 384 Hz. Find the beat frequency when the tension in the wire is reduced by 0.21 N.

Describe Young's double-slit interference experiment.

Draw the impedance triangle for a series LCR AC circuit and write the expressions for the impedance and the phase difference between the emf and the current.

What does a heat engine consist of?

Define the coefficients of absorption, reflection and transmission. Obtain the relation between them.

With a neat labelled ray diagram explain the use of Fresnel's biprism to obtain two coherent sources.