Physics Test - ...

Unit of solid angle is

Lenz’s law is a consequence of the law of conservation of-

A flux of 0.2 Wb, linked with a coil having 50 turns, is reduced to zero in one second. What is the average emf induced in the coil?

A wire of length \(10 {~cm}\) has resistance \(12 \Omega\). It is bent in the form of a circle. The effective resistance between the two points of its diameter is equal to:

Match List-I with List-II and select the correct answer with the help of codes given below:

A box is moved along a straight line by a machine delivering constant power. The distance moved by the body in time t is proportional to

Directions: The following question has four choices out of which only one is correct.
A bar magnet of length 3 cm has points A and B along its axis at distances of 24 cm and 48 cm, respectively, on the opposite sides.
Ratio of the magnitudes of the magnetic fields at these points will be

Match List-I with List -II and select the correct answer using the codes given below the lists:

The mass of a planet is six times that of the Earth. The radius of the planet is twice that of the Earth. If the escape velocity from the Earth is$\text{'}ve\text{'}$,theescape velocity from the planet will be

The potential energy in a spring, when stretched by 2 cm, is 'U'. Its potential energy, when stretched by 10 cm, is