List of top Physics Questions

X-rays are
What is the main difference between isotopes of the same element?
Which series of hydrogen spectrum lies in visible portion?
What is the energy of a photon with a wavelength of 500 nm?
(Use \( c = 3 \times 10^8 \) m/s and \( h = 6.626 \times 10^{-34} \) Js)
Which one of the following is not a type of radioactive decay?
Which logic gate's output is true only if the inputs are different?
Reverse biased diode is
What type of wave is used in fibre optic communication?
In n-type semiconductor the minority charge carrier is/are
When boron is mixed as impurity in silicon, then resultant matter is
Boolean expression of NAND gate is
Which of the following is used to reduce chromatic aberration in lenses?
A convex lens is dipped in a liquid, whose refractive index is equal to the refractive index of the material of the lens. Then its focal length will
Which of the following cannot be polarized?
The bubble of soap appears coloured due to
A person uses spectacles (lens) of +2D power. His defect of vision is.
Power of a convex lens is 2 dioptre. Its focal length will be
If two converging lenses of equal focal length \(f\) are kept in contact, then the focal length of the combination will be
In the phenomenon of photoelectric emission, on increasing the intensity of incident light, the photoelectric current
The wavelength of de Broglie wave associated with any moving particle does not depend on
The formula of kinetic mass of photon is
The speed of electromagnetic wave in any material medium does not depend on.
In polarised light the angle between plane of vibration and plane of polarization is
Which of the following is not an electromagnetic wave?
Inside a closed surface, n electric dipoles are situated. The electric flux coming out from the closed surface will be