List of top Physics Questions

Match the following:

Physical quantity		SI Unit
i	Electric current	a	Coulomb
ii	Electric charge	b	Volt
iii	Electric potential	c	Ampere

The material suitable for making heating element of electric iron is

Pick the correct answer from the following two statements:
a) A lens has at least one curved surface.
b) A plano-concave lens has two curved surfaces.

A convex lens gives an image of the same size of the object when the object is placed

Which of the following lens is used as magnifying lens?

A focal plane is

According to laws of refraction, which of the following lie in the same plane?

A light ray travels from air to glass with an angle of incidence of 45°. The possible angle of refraction is

The speed of light in benzene is 2×10⁸ m/s. Its refractive index is (speed of light in vacuum = 3x10⁸m/s)

Which of the following is not an example of refraction?

A samosa appears to be cool outside but it is hot when we eat because the curry inside it has ingredients of

When touched, we feel that a metal piece is colder than a wooden piece. This is due to the transfer of heat from our fingers to

Two bodies A and B are at temperatures - 100 °C and 173 K respectively. The body at higher temperature is

The amount of heat required to raise the temperature of 1 gram of water by 1 °C is called

The kinetic energy of a particle of mass m executing linear simple harmonic motion with angular velocity $ω$ and amplitude $a$ is $\frac 1{4} ma^2ω^2$ at a distance of _______from the mean position.

The velocity of a transverse wave propagating on a stretched string represented by the equation, $y = 0.5sin(x)(\frac{\pi}2 t + \frac{\pi}3 x)$ is (where x and y are in metres and / in seconds)

If the ratio of the acceleration due to gravity on the surface of earth to that on the surface of the moon is 6:1, then the ratio of the periods of a simple pendulum on their surfaces is

A planet with radius R and acceleration due to gravity g, will have atmosphere only if r.m.s. speed of air molecules is less than

The ratio of the kinetic energy values of 4g of hydrogen ($H_2$) to 7g of nitrogen ($N_2$) at room temprature is

When an ideal diatomic gas is heated at constant pressue, fraction of heat enerry supplied that increases the internal energy of the gas is

When the temperature of the source of a Carnot engine is at 400 K, its efficiency is 25%. The required increase in temperature of the source to increase the efficiency to 50% is

A process in which there is no flow of heat between the system and surroundings is a/an

Two thermally insulated identical vessels A and B are connected through a stopcock. A contains a gas at STP and B is completely evacuated. If the stopcock is suddenly opened then

According to equation of continuity when a liquid flows through a tube of variable cross section a with variable velocity v, the quantity that remains constant is

When a body is strained, energy stored per unit volume is (Y-Young's modulus)