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

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.

Select the most appropriate option with regard to resonance in a series LCR circuit.

What is a heat engine?

Mention any two elements of a heat engine.

One beat means that the intensity of sound should be ______.

Two parallel SHMs are given by `x_1 = 10 sin (8pit + pi/6) m and x_2 = 20 sin 8pit m` Find the phase of SHM. 

Explain the construction and working of sonometer hence explain its use to verify first law of vibrating string (Law of length).

In biprism experiment, the distance of 20^th bright band from the central bright band is 1.2 cm. Without changing the experimental set-up, the distance of 30^th bright band from the central bright band will be ______.

A and B are two steel wires and the radius of A is twice that of B. If they are stretched by the same load, then the stress on B is .....

The process of superimposing a low frequency signal on a high frequency wave is_______ .