A 500 kg car takes a round turn of radius 50 m with a velocity of 36 km/hr . The centripetal force is

Insect moves over surface of water because of

Two capillary tubes of radii 0.6 cm and 0.3 cm are dipped in the same liquid .The ratio of heights through which the liquid will rise in the tubes is

The water droplets are spherical in free fall due to

Two stones with radii 1:2 fall from a great height through atmosphere. Their terminal velocities are in the ratio

The average energy per molecule is proportional to

The power radiated by a perfect blackbody depends only on its

Which of the following is correct, when the energy is transferred to a system from its environment?

Which of the following system freely allows exchange of energy and matter with its environment?

A gas in a closed container is heated with 10J of energy. Causing the lid of the container to rise 2m with 3N of force. What is the total change in energy of the system?

Heating a gas in a constant volume container is an example of which process?

A particle is moving in a circle with uniform speed. Its motion is

In a second's pendulum, mass of Bob is 50 g. If it is replaced by 100 g mass, then its period will be

A man standing unsymmetrical position between two mountains and fires a gun. He hears the first echo after 1.5 s and the second echo after 2.5 s. If the speed of sound in air is 340 m/s, then the distance between the mountains will be

The integral multiple of fundamental frequencies are

When light travels from an optically rarer medium to an optically denser medium, the speed decreases because of change in

Which of the following cannot produce two coherent soures?

A metal foil of negligible thickness is introduced between two plates of a capacitor at the center. The capacitance of capacitor will be

A series LCR resonant circuit is used as

A parallel LC resonant circuit is used as

According to De- Broglie, the waves are associated with

The ratio of areas of the circular orbit of an electron in the ground state to that of first excited state of an electron in hydrogen atom is ....

In a Bipolar junction transistor, the largest current flows through

In a transistor amplifier, $$I_c$$  =5.5 mA, $$I_E$$  = 5.6 mA. The current amplification factor $$\beta$$   is ........ .

Surface tension of a liquid at critical temperature is

Insect moves over surface of water because of

The water droplets are spherical in free fall due to

Acceleration of a particle executing S.H.M. at its mean position.