Physics questions
20027 published questions with worked solutions.
- A biconvex lens has radii of curvature, 20 cm each. If the refractive index of the material of the lens is 1.5, the power of the...
- When light propagates through a material medium of relative permittivity _r and relative permeability _r, the velocity of light,...
- Two objects of mass 10 kg and 20 kg respectively are connected to the two ends of a rigid rod of length 10 m with negligible...
- The energy that will be ideally radiated by a 100 kW transmitter in 1 hour is :
- An electric lift with a maximum load of 2000 kg (lift + passengers) is moving up with a constant speed of 1.5 m s^ -1 . The...
- If a soap bubble expands, the pressure inside the bubble :
- Given below are two statements : Statement I : Biot-Savart's law gives us the expression for the magnetic field strength of an...
- A shell of mass m is at rest initially. It explodes into three fragments having mass in the ratio 2 : 2 : 1. If the fragments...
- The angular speed of a fly wheel moving with uniform angular acceleration changes from 1200 rpm to 3120 rpm in 16 seconds. The...
- The peak voltage of the ac source is equal to :
- The dimensions [MLT^ -2 A^ -2 ] belong to the :
- The angle between the electric lines of force and the equipotential surface is :
- Plane angle and solid angle have :
- In a Young's double slit experiment, a student observes 8 fringes in a certain segment of screen when a monochromatic light of...
- A light ray falls on a glass surface of refractive index 3 , at an angle 60°. The angle between the refracted and reflected rays...
- A body of mass 60 g experiences a gravitational force of 3.0 N, when placed at a particular point. The magnitude of the...
- A square loop of side 1 m and resistance 1 is placed in a magnetic field of 0.5 T. If the plane of loop is perpendicular to the...
- A long solenoid of radius 1 mm has 100 turns per mm. If 1 A current flows in the solenoid, the magnetic field strength at the...
- Two pendulums of length 121 cm and 100 cm start vibrating in phase. At some instant, the two are at their mean position in the...
- Two transparent media A and B are separated by a plane boundary. The speed of light in those media are 1.5 10^ 8 m/s and 2.0 10^...