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

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_______ .

State and prove: Law of conservation of angular momentum.

Obtain an expression for average power dissipated in a purely resistive A.C. circult. 

Define modulation and transducer

Draw a diagram showing all components of forces acting on a vehicle moving on a curved banked road. 

Wavelengths of two notes in the air are`[70/153]^m` and `[70/157]^m`. Each of  these notes produces 8 beats per second with a tuning fork of fixed frequency. Find the velocity of sound in the air and frequency of the tuning fork.