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

Calculate the radius of the first Bohr orbit in the hydrogen atom.

Assuming the expression for the pressure P exerted by an ideal gas, prove that the kinetic energy per unit volume of the gas is `3/2` P.

What is the origin of spectral lines? Obtain an expression for the wave number of a line in hydrogen spectrum.

What is the effect of decreasing the current through the potentiometer on the null point?

Find the momentum of the electron having de Broglie wavelength of 0.5 A.

For a particle performing circular motion, when is its angular acceleration directed opposite to its angular velocity?

What is a stationary wave?

Given the nuclear radius of ¹⁶O is 3.024 fm, find that of ²³⁵U.

Show that the angular speed of an electron in the nth Bohr orbit is w = `(πme^4)/(2ε_0^2h^3n^3)` and the corresponding frequency of the revolution of the electron is f = `(me^4)/(4ε_0^2h^3n^3)`.

State and prove the theorem of the parallel axis about the moment of inertia.

A particle carrying 8 electron charges starts from rest and is accelerated through a potential difference of 9000 V. Calculate the KE acquired by it in keV.

State the expressions for the displacement, velocity and acceleration draw performing linear SHM, starting from the positive extreme position. Hence, their graphs with respect to time.

The half-life of `""_82^210Pb` is 22.3 y. How long will it take for its activity 0 30% of the initial activity?

What should be the diameter of a soap bubble such that the excess pressure inside it is 51.2 Pa? [Surface tension of soap solution = 3.2 × 10⁻² N/m]

According to the kinetic theory of gases, at a given temperature, molecules of all gases have the same ______.

Define the coercivity of a magnetic material.

What is the radius of gyration of a right circular cone of base radius R for rotation about the central symmetry axis of the cone?

State the expression for the total energy of SHM in terms of acceleration.

Prove the theorem of perpendicular axes about the moment of inertia.

Compute the shortest and the longest wavelength in the Lyman series of hydrogen atom.