Question Bank [ 2022 ] — Physics STD 12 Science — Question

Is it always necessary of use red light to get photocelectric effect?

In which thermodynamic process the total internal energy of system remains constant?

State first law of thermodynamics.

What is the angular speed of a particle moving in a circle of radius r centimetres with a constant speed of v cm/s ?

A string 1 m long is fixed at one end. The other end is moved up and down with a frequency of 20 Hz. Due to this, a stationary wave with four complete loops gets produced on the string. Find the speed of the progressive wave which produces the stationary wave.

Why two light sources must be of equal intensity to obtain a well-defined interference pattern?

Does the angle of banking depend on the mass of the vehicle?

Find the radius of gyration of a uniform disc about an axis perpendicular to its plane and passing through its center.

What is the energy associated with the random, disordered motion of the molecules of a system called as?