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Explore Class 12 Physics past and model questions by chapter, year, marks and question type.
478 questions found
The values of $R$ and $X$ were doubled and then interchanged. What would be the new position of balance point?
What is the distance between two consecutive particles in a wave which are in the same phase?
λ/4
λ/2
3λ/4
λ
In our country Nepal, the supply ac voltage is 220 V. The peak value of voltage is about
110 V
220 V
310 V
350 V
Define the moment of inertia.
State Bernoulli’s principle.
Write an expression for total energy of a particle executing SHM. Also draw a graph showing the variation of K.E. and P.E. of it
A moving coil is very sensitive device to measure very small current.
i) Define voltage sensitivity of moving coil galvanometer. On which factors does it depend?
ii) Why is magnetic field made radial in a moving coil galvanometer?
the difference in pressure at A and B.
the speed at B.
A uniform rod of mass m and length L is rotating about an axis AB passing through its one end and perpendicular to the length. Calculate the moment of inertia of the rod about the axis AB.
A fly wheel of moment of inertia 0.32 kgm² is rotated steadily at 120 rad/sec by a 50 watt electric motor. Calculate:
i) The kinetic energy of the fly wheel.
ii) The frictional couple opposing the rotation.
Obtain an expression for magnetic field strength at the centre of current carrying circular coil using Biot-Savart's law.
One end of a light spring having spring constant 18 N/m is attached to a rigid support. A mass of 0.15 kg is suspended from other end of the spring. A student pulls down it such that extension of spring increases by 4 cm. The student now releases it, as a result, the mass performs SHM.
i) Define simple harmonic motion. [1]
ii) Calculate the maximum acceleration and time period of SHM. [2]
Derive a relation between surface tension and surface energy.
Define indicator diagram.
Estimate the work done during II process.
Explain photoelectric effect and write Einstein photoelectric equation.
Derive an expression for the force exerted per unit length between two parallel current carrying conductors if currents are flowing in the same direction. Hence, define one ampere current.
Calculate the wavelength of wave in air at 25°C if the frequency of the wave is 256 Hz and velocity of sound at 0°C is 330 m s⁻¹
The arrangement of potentiometer circuit for the determination of internal resistance of a cell (r) is shown in figure. Derive an expression for internal resistance of the cell.
