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

In a series LCR circuit, if resistance, inductive reactance and capacitive reactance are 3\(\Omega\), 8\(\Omega\) and 4\(\Omega\) respectively, calculate phase difference between voltage and current.
A body of mass 0.8 kg performs linear S.H.M. It experiences a restoring force of 0.4N, when its displacement from mean position is 4 cm. Determine Force constant and Period of S.H.M.
Draw a neat and labelled circuit diagram for a full wave rectifier.
In a thermodynamic system, define -- (a) Mechanical equilibrium (b) Chemical equilibrium and (c) Thermal equilibrium
What is Brewster's law? Derive the formula for Brewster's angle.
State and prove the law of conservation of angular momentum.
State any four advantages of light emitting diode (LED).
Calculate the energy radiated in one minute by a perfectly black body of surface area 200 cm\(^2\) when it is maintained at 127\(^{\circ}\)C.
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.
Explain harmonics and overtones.
What is value of B called, when H = 0 is in the hysteresis loop?
State the formula for angle of banking.
What is the work done by an external uniform magnetic field perpendicular to the velocity of a moving charge?
Define self inductance.
What do you mean by a thermodynamic system?
Calculate the electric field intensity at a point just near the surface of a charged plane sheet, measured from its mid-point. [ \( \sigma = 8.85 \, \mu C/m^2 \) ]
Find kinetic energy of 1 litre of an ideal gas at S.T.P.
The gate which produces high output, when its both inputs are high is --
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?
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 --
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 .............
In Bernoulli's theorem, which of the following is constant?
Electric potential 'V' at a distance 'r' from a point charge is directly proportional to ............

Explain the construction of a spherical wavefront by using Huygens' principle.