List of top Physics Questions asked in Maharashtra Class XII

A string of length 2 m is vibrating with 2 loops. The distance between its node and adjacent antinode is ............
In Bernoulli's theorem, which of the following is constant?
At what temperature the surface tension of a liquid becomes zero?
What is Brewster's law? Derive the formula for Brewster's angle.
Calculate the electric field intensity at a point just near the surface of a charged plane sheet, measured from its mid-point. [ \( \sigma = 8.85 \, \mu C/m^2 \) ]
State any four advantages of light emitting diode (LED).
Electric potential 'V' at a distance 'r' from a point charge is directly proportional to ............
Draw a neat and labelled circuit diagram for a full wave rectifier.
What is value of B called, when H = 0 is in the hysteresis loop?
State the formula for angle of banking.
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.
Define self inductance.
Using Newton's law of viscosity for streamline flow, derive an expression for coefficient of viscosity.
Obtain an expression for average power dissipated in a series LCR circuit.
"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 :
State and prove the law of conservation of angular momentum.
State and prove Kirchhoff's law of heat radiation.
State any four uses of Van de Graaff generator. In a parallel plate air capacitor, intensity of electric field is changing at the rate of \(2 \times 10^{11}\) V/ms. If area of each plate is 20 cm\(^2\), calculate the displacement current.
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 ............
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.
Which of the following materials belongs to diathermanous substance?
What is Ferromagnetism? Explain it on the basis of domain theory.
Distinguish between interference and diffraction of light. A double slit arrangement produces interference fringes for sodium light of wavelength 589 nm, that are 0.20 degree apart. What is the angular fringe separation if the entire arrangement is immersed in water? (R.I. of water = 1.33)
A solenoid of length \(\pi\) m and 5 cm in diameter has a winding of 1000 turns and carries a current of 5A. Calculate the magnetic field at its centre along the axis.
Diameter of a water drop is 0.6 mm. Calculate the pressure inside a liquid drop. (T = 72 dyne/cm, atmospheric pressure = \(1.013 \times 10^5\) N/m\(^2\))