List of top Physics Questions asked in JEE Main, KCET

Waves that cannot be polarised are

In a charged capacitor the energy is stored in

Radio waves and visible light in vacuum have

The resistance of an ideal ammeter is

After an interval on one day ${1/6}^{th}$ of the initial amount of a radioactive material remains in a sample. Then its half life is

The relation between $\alpha\,and\,\beta$ parameters of a transistor is given by

An atom of mass number A and atomic number Z emits successively an $\alpha$-particle, a $\beta$-particle and a $\gamma$-ray. The mass number and atomic number of the end product are

Relative permeability of iron is 5500. Its magnetic susceptibility is

In the Nuclear reaction given below : $_7N^{14}+2He^4\rightarrow\,X+_1H^1$, the nucleus X is

The phenomenon of diffraction of light was discovered by

In a cinema hall the distance between the projector and the screen is increased by 2 %. Now the intensity of illumination of the screen

A mirror forms a real image of unit magnification. Its nature is

Biaxial crystal among the following is

Mass of a photon of frequency v is given by

A body is projected vertically upwards from the surface of a planet of radius $R$ with a velocity equal to half the escape velocity for that planet. The maximum height attained by the body is

A mirror forms a real image of unit magnification, Its nature is

Electric charges $+ 10\mu C, + 5\mu C, - 3 \mu C\, and\, + 8 \mu C$ are placed at the comers of a square of side $\sqrt2\,m$. The potential at the centre of the square (V) is

Mean life of a radioactive element is one year. Then its half life is (in year)

Biaxial crystal among the following is

The number of atoms in a radioactive sample reduces from 1000 to 100 in two days. Then the number of atoms remaining at the end of four days is

Ionisation energy of hydrogen atom is 13.6 eV. Then the energy required to ionise a hydrogen atom in which the electron is in the second orbit from the nucleus is (eV)

A convex lens of refractive index $n$ behaves as a convex lens of smaller power in a liquid of refractive index $n_1$ and as a concave lens in another liquid of refractive index $n_2$. Then relation between $n,n_1$ and $n_2$ is

Three similar cells, each of emf 2 V and internal resistance $r\,\Omega$ send the same current through an external resistance of $2\,\Omega$ when connected in series or in parallel. The strength of the current flowing through the external resistance is (A)

Interference fringes are obtained using two coherent sources whose intensities are in the ratio 4 : 1. Then the ratio of the intensities of the bright and dark bands is

S.l. unit of surface tension is