List of top Physics Questions

An eye specialist prescribes spectacles having combination of convex lens of focal length 40 cm in contact with a concave lens of focal length 25 cm. The power of this lens combination in diopters is

In a resonance column experiment the first resonance is obtained at 16 cm and the second at 50 cm. The value of end correction is:

Which of the following instrument is used to measure temperature of the source from its thermal radiations?

The mass moment of inertia, of a body depends upon

The focal length of converging lens is measured for violet, green and red colours. It is respectively $f_v , f_g, f_r $ We will get

The dimensional formula of Planck's constant is

In the nuclear reactions, there is a conservation of

In a coil of self-inductance $5$ henry, the rate of change of current is $2$ ampere per second. The e.m.f. induced in the coil, is

If $???? is stress and $???? is Young?? modulus of a wire material, then energy stored in the wire per unit volume, is

Electron volt (eV) is the unit of

During melting process, the heat given to a body is utilised in

Chromatic aberration of lens can be corrected by

At sea level, the value of $g$ is minimum at

Sound waves cannot propagate through vacuum but light waves can. Sound waves cannot be polarised but light waves can be.

Four capacitors each of capacitance C are in parallel combination. The equivalent capacitance is:

Optically active substance among the following is

A convex lens is placed in a medium in which it behaves like a glass plate. The refractive index of the medium, will be

When a large bubble rises from the bottom of a lake to the surface, its radius is doubled. The atmospheric pressure is equal to that of a column of water of height $H$. The depth of the lake is

What can be the angle between $\vec{P}+\vec{Q}$ and $\vec{P}-\vec{Q}$ ?

If the magnetic field is parallel to a surface, then magnetic flux at right angle to the surface, is

In a pure semiconductor crystal, if current flows due to breakage of crystal bonds, then the semiconductor, is called

The temperature of the sun is measured with

Which of the following is the infrared wavelength?

A beam of light in air enters into the water. Which of the following characteristics of light will not change?

In Lenz?s law, there is a conversion of