HSC Science (Electronics) 12th Standard Board Exam - Maharashtra State Board Question Bank Solutions

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

A stretched string 0.7 m long and fixed at its ends vibrates in the second overtone of frequency 300 Hz. Find the speed of the transverse wave on the string.

Define electric polarization in dielectrics.

When two kilocalories of heat are supplied to a system, the internal energy of the system increases by 5030 J and the work done by the gas against the external pressure is 3350 J. Calculate J, the mechanical equivalent of heat.

Explain the thermodynamic process.

Unpolarized light with intensity I₀ is incident on two polarizers initially oriented for maximum transmission. What is the intensity of the light transmitted through the second polarizer if the second polarizer is rotated through (a) 30° (b) 60°?

Which magnetic properties are desirable for making a permanent magnet?

Define moment of inertia.

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.

The wavelengths of a certain blue light in air and in glass are 480 nm and 320 nm, respectively. Find the Brewster angle for this blue light incident on the glass.

How does the fundamental frequency of a vibrating string depend on the radius of the cross-section of the string and the mass density material of the string?  

Unpolarized light is passed through two polarizers that are oriented with their transmission axes perpendicular. What percentage of the light intensity passed by the first polarizer is the light intensity passed by the second polarizer when the second polarizer is rotated through 30°?

Two organ pipes closed at one end have the same diameters but different lengths. Show that the end correction at each end is e = `(n_1l_1 - n_2l_2)/(n_2 - n_1)`, where the symbols have their usual meanings. Take `γ = 5/3`.

Two wires, each 1 m long and of the same diameter, have densities 8 × 10³ kg/m³ and 2 × 10³ kg/m³ and are stretched by tensions 196 N and 49 N respectively. Compare their fundamental frequencies.

Prove that for pipe closed at one end, the end correction is `e = (n_2l_2-n_1l_1)/(n_1-n_2)`

The graph between instantaneous velocity and displacement of a particle performing SHM is ______.

Define binding energy per nucleon.

State the significance of binding energy per nucleon.

Which of the following quantities is a measure of stability of nucleus?

Define angular momentum.