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

Is it always necessary to use red light to get photoelectric emission?
State the formula for critical velocity in terms of Reynold's number for a flow of a fluid.
Write the differential equation for angular S.H.M.
In Young's double slit experiment the two coherent sources have different amplitudes. If the ratio of maximum intensity to minimum intensity is 16 : 1, then the ratio of amplitudes of the two sources will be ______.
Define potential gradient of the potentiometer wire.
The equation of a simple harmonic progressive wave travelling on a string is \( y = 8 \sin (0.02 x - 4 t) \) cm. The speed of the wave is ______.
The unit Wbm\(^2\) is equal to ______.
When the bob performs a vertical circular motion and the string rotates in a vertical plane, the difference in the tension in the string at horizontal position and uppermost position is ______.
A liquid rises in glass capillary tube up to a height of 2.5 cm at room temperature. If another glass capillary tube having radius half that of the earlier tube is immersed in the same liquid, the rise of liquid in it will be ______.
The property of light which does not change, when it travels from one medium to another is ______.
The root mean square speed of the molecules of a gas is proportional to ______. [T = Absolute temperature of gas]
The angle at which maximum torque is exerted by the external uniform electric field on the electric dipole is ______.
The average value of alternating current over a full cycle is always ______.
The first law of thermodynamics is concerned with the conservation of ______.