List of top Physics Questions asked in Maharashtra Board Class XII Exam

Derive an expression for a pressure exerted by a gas on the basis of kinetic theory of gases.
Derive an expression for terminal velocity of a spherical object falling under gravity through a viscous medium.
Derive an expression for emf (\( e \)) generated in a conductor of length (\( l \)) moving in uniform magnetic field (\( B \)) with uniform velocity (\( v \)) along x-axis.
Calculate the value of magnetic field at a distance of 3 cm from a very long, straight wire carrying a current of 6A.
Determine the shortest wavelengths of Balmer and Paschen series. Given the limit for Lyman series is 912 Å.
What is magnetization, magnetic intensity, and magnetic susceptibility?
Define:
(a) Inductive reactance
(b) Capacitive reactance
(c) Impedance
Prove that the frequency of beats is equal to the difference between the frequencies of the two sound notes giving rise to beats.
With the help of a neat diagram, explain the reflection of light on a plane reflecting surface.
A 0.1 H inductor, a 25 × 10\(^{-6}\) F capacitor, and a 15 Ω resistor are connected in series to a 120 V, 50 Hz AC source. Calculate the resonant frequency.
The difference between the two molar specific heats of a gas is 9000 J/kg K. If the ratio of the two specific heats is 1.5, calculate the two molar specific heats.
Eight droplets of water each of radius 0.2 mm coalesce into a single drop. Find the decrease in the surface area.
Plane wavefront of light of wavelength 6000 Å is incident on two slits on a screen perpendicular to the direction of light rays. If the total separation of 10 bright fringes on a screen 2 m away is 2 cm, find the distance between the slits.
Distinguish between potentiometer and voltmeter.
What are mechanical equilibrium and thermal equilibrium?
An electron in an atom is revolving round the nucleus in a circular orbit of radius 5.3 × 10\(^{-11}\) m with a speed of 3 × 10\(^6\) m/s. Find the angular momentum of electron.
What are harmonics and overtones (Two points)?
What are polar dielectrics and non-polar dielectrics?
What is a thermodynamic process? Give any two types of it.
Derive an expression for the radius of the \( n \)-th Bohr orbit of the electron in hydrogen atom.
Define moment of inertia of a rotating rigid body. State its SI unit and dimensions.
Two inductor coils with inductance 10 mH and 20 mH are connected in series. What is the resultant inductance of the combination of the two coils?
What is the mathematical formula for third postulate of Bohr's atomic model?
Calculate the moment of inertia of a uniform disc of mass 10 kg and radius 60 cm about an axis perpendicular to its length and passing through its centre.
Write the Boolean expression for Exclusive-OR (XOR) gate.