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

Define coefficient of viscosity. State its formula and S.I. units.
State the formula giving relation between electric field intensity and potential gradient.
If friction is made zero for a road, can a vehicle move safely on this road?
An electron is accelerated through a potential difference of 100 volts. Calculate the de-Broglie wavelength in nm.
What is the average value of alternating current over a complete cycle?
Calculate the velocity of a particle performing S.H.M. after 1 second, if its displacement is given by \( x = 5 \sin\left(\frac{\pi t}{3}\right) \) m.
Answer the following questions:
What is the value of resistance for an ideal voltmeter?
What is the value of force on a closed circuit in a magnetic field?
If a circular coil of 100 turns with a cross-sectional area of 1 m² is kept with its plane perpendicular to the magnetic field of 1 T, the magnetic flux linked with the coil will be ..........
If ‘θ’ represents the angle of contact made by a liquid which completely wets the surface of the container then ..........
If the maximum kinetic energy of emitted electrons in photoelectric effect is 2eV, the stopping potential will be ............
The radius of eighth orbit of electron in H-atom will be more than that of fourth orbit by a factor of ........
The LED emits visible light when its ...........
Soft iron is used to make the core of transformer because of its ...........
The first law of thermodynamics is consistent with the law of conservation of ...........
The property of light which remains unchanged when it travels from one medium to another is ........
Y = A + B is the Boolean expression for ...........
If ‘n’ is the number of molecules per unit volume and ‘d’ is the diameter of the molecules, the mean free path ‘\(\lambda\) of molecules is
Draw a neat, labelled diagram of a suspended coil type moving coil galvanometer. The initial pressure and volume of a gas enclosed in a cylinder are 2 × 10^5 N/m² and 6 × 10^{-3} m³ respectively. If the work done in compressing the gas at constant pressure is 150 J, find the final volume of the gas.
What is a rectifier? With the help of a neat circuit diagram, explain the working of a half wave rectifier.
Define second's pendulum. Derive a formula for the length of second's pendulum. A particle performing linear S.H.M. has maximum velocity 25 cm/s and maximum acceleration 100 cm/s². Find period of oscillations.
Explain de Broglie wavelength. Obtain an expression for de Broglie wavelength of wave associated with material particles. The photoelectric work function for a metal is 4.2 eV. Find the threshold wavelength.
A parallel plate capacitor filled with air has an area of 6 cm² and plate separation of 3 mm. Calculate its capacitance.
An emf of 91 mV is induced in the windings of a coil, when the current in a nearby coil is increasing at the rate of 1.3 A/s, what is the mutual inductance (M) of the two coils in mH?
Two cells of emf 4V and 2V having respective internal resistance of 1 Ω and 2 Ω are connected in parallel, so as to send current in the same direction through an external resistance of 5 Ω. Find the current through the external resistance.