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

State any four advantages of light emitting diode (LED).
Explain harmonics and overtones.
State the formula for magnetic induction produced by a current in a circular arc of a wire. Hence find the magnetic induction at the centre of a current carrying circular loop.
Two coils having self inductances 60 mH each, are coupled with each other. If the coefficient of coupling is 0.75, calculate the mutual inductance between them.
Using Newton's law of viscosity for streamline flow, derive an expression for coefficient of viscosity.
State and prove the law of conservation of angular momentum.
What is the work done by an external uniform magnetic field perpendicular to the velocity of a moving charge?
Calculate the electric field intensity at a point just near the surface of a charged plane sheet, measured from its mid-point. [ \( \sigma = 8.85 \, \mu C/m^2 \) ]
At what temperature the surface tension of a liquid becomes zero?
State the formula for angle of banking.
What is value of B called, when H = 0 is in the hysteresis loop?
Find kinetic energy of 1 litre of an ideal gas at S.T.P.
Define self inductance.
What do you mean by a thermodynamic system?
A string of length 2 m is vibrating with 2 loops. The distance between its node and adjacent antinode is ............
Which of the following equations gives correct expression for the internal resistance of a cell by using potentiometer?
The gate which produces high output, when its both inputs are high is --
A transformer increases an alternating e.m.f. from 220V to 880V. If primary coil has 1000 turns, the number of turns in the secondary coil are .............
The power rating of a ceiling fan rotating with a constant torque of 2 Nm with an angular speed of 2\(\pi\) rad/s will be ............
An electron, a proton, an \(\alpha\)-particle and a hydrogen atom are moving with the same kinetic energy. The associated de-Broglie wavelength will be longest for --
Electric potential 'V' at a distance 'r' from a point charge is directly proportional to ............
In Bernoulli's theorem, which of the following is constant?
Which of the following materials belongs to diathermanous substance?
"If two systems are each in thermal equilibrium with a third system, they are also in thermal equilibrium with each other." This statement refers to :

Derive an expression for maximum speed of a vehicle moving along a horizontal circular track.