List of top Physics Questions

The device which maintains a constant potential difference between its ends is called
Two resistors of 0·4 Ω and 0·6 Ω are connected in parallel combination. Their equivalent resistance is
The junction law proposed by Kirchhoff is based on
The materials which have large number of free electrons and offer low resistance are called
A fuse is made up of
If the specific resistance of a wire of length 2 m and area of cross-section 1 mm2 is 10–8 Ω-m, then calculate the resistance.
An evidence for the motion of charge in the atmosphere is provided by
The electric energy (in kWh) consumed in operating a bulb of 60 W for 10 hours a day is
The scientific demonstration of H.C. Oersted is related to the study of
Pick the correct answer from the following two statements :
(a) Within a bar magnet, magnetic field lines travel from south pole to north pole.
(b) Outside bar magnet, magnetic field lines travel from north pole to south pole.
Weber is the S.I. unit of
The magnetic force acting on a straight wire of length l carrying a current I which is placed perpendicular to the uniform magnetic field B is
Mechanical energy is converted into electrical energy in
The device which contains slip rings to reverse the direction of current through coil is called
An increase in magnetic flux through a coil of 500 turns in 0·1 s is 0·001 Wb. The maximum induced EMF generated in the coil is
If ε and ∆t are the induced EMF and time respectively, then the change in magnetic flux is given by
Which of the following rays undergoes deviation by a lens?
If v1and v2 are the speeds of light in the two media of refractive indices n1 and n2 respectively, then
Which among the following statements on mirage is false?
Which among the following are used in transport communication signals through light pipes?
The refractive index of a medium is 2. The speed of light in that medium is
Refraction does not take place when the angle between the incident light ray and normal to the interface is
Freezing of water takes place at a temperature and atmospheric pressure of
Pick the false statement on specific heat
The relationship between average kinetic energy (E) of water molecules and its absolute temperature (T ) is given by