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

Two wires of the same material and the same cross-section are stretched on a sonometer. One wire is loaded with 1.5 kg and another is loaded with 6 kg. The vibrating length of the first wire is 60 cm and its fundamental frequency of vibration is the same as that of the second wire. Calculate the vibrating length of the other wire.

A set of 8 tuning forks is arranged in a series of increasing order of frequencies. Each fork gives 4 beats per second with the next one and the frequency of last fork is twice that of the first. Calculate the frequencies of the first and the last fork.

A sonometer wire is stretched by the tension of 40 N. It vibrates in unison with a tuning fork of frequency 384 Hz. How many numbers of beats get produced in two seconds if the tension in the wire is decreased by 1.24 N?

What are beats?

State any four applications of beats.

Two wires of the same material and same cross-section are stretched on a sonometer. One wire is loaded with 1 kg and another is loaded with 9 kg. The vibrating length of the first wire is 60 cm and its fundamental frequency of vibration is the same as that of the second wire. Calculate the vibrating length of the other wire. 

A stretched sonometer wire is in unison with a tuning fork. When the length is increased by 4%, the number of beats heard per second is 6. Find the frequency of the fork.

Explain the production of beats and deduce analytically the expression for beats frequency.

Two coherent sources whose intensity ratio is 25:1 produce interference fringes. Calculate the ratio of amplitudes of light waves coming from them.

Why two light sources must be of equal intensity to obtain a well-defined interference pattern?

Draw a neat labelled ray diagram of the Fresnel Biprism experiment showing the region of interference. 

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.