List of top Physics Questions asked in JEE Main

A projectile is thrown upward at an angle $60^\circ$ with the horizontal. The speed of the projectile is $20$ m/s when its direction of motion is $45^\circ$ with the horizontal. The initial speed of the projectile is ________ m/s.

300 J of energy is given to a gas at constant volume which increases its temperature from $20^\circ$C to $50^\circ$C. If $R = 8.3$ S.I. units and $C_v = \dfrac{5R}{2}$, find mass of gas.

An ideal gas in a closed rigid container is at 50$^\circ$C and pressure 3.23 kPa. If temperature is doubled, find new pressure in Pa :

A wave propagates whose electric field is given by \[ \vec{E} = 69 \sin(\omega t - kx)\,\hat{j}. \] Find the direction of the magnetic field.

For a gas P-V curve is given as shown in the diagram. Curve path follows equations $(V - 2)^2 = 4aP$. Find work done by gas in given cyclic process.

In a potentiometer, the null point for two resistances $R_1$ and $R_2$ is at $40\ \text{cm}$ as shown. If a $16\,\Omega$ resistance is connected in parallel to $R_2$, the null point shifts to $50\ \text{cm}$. Find the values of $R_1$ and $R_2$ respectively.

Find the heat produced in the external circuit $ (AB) $ in one second.

Balls are dropped at regular intervals from height 5 m. If the first ball touches the ground when $6^{th}$ ball is about to be dropped, find the height of $4^{th}$ ball above the ground at the same instant :

Find work done in bringing charge q = 3nC from infinity to point A as shown in the figure :

A bar magnet is kept such that it is making an angle of 30$^\circ$ with the magnetic field. The torque acting on the magnet is 0.016 N-m. Find the amount of work done by external agent in rotating the magnet from most stable position to most unstable position.

An ideal solenoid is kept with its axis vertical. Current $I_0$ is flowing in the solenoid. A charge $Q$ is thrown downward inside the solenoid. The acceleration of the charged particle is then

Three very long parallel wires carrying current as shown. Find the force acting at 15 cm length of middle wire :

The equilateral triangular frame has current 2A. The side of frame is $4\sqrt{3}$ cm. Magnetic field at center C is:

A circular coil of radius R carries current such that magnetic field at its centre is 16$\mu$T. Find the magnetic field on the axis at a distance of $\sqrt{3}R$ from the centre of coil.

For a circular coil of radius $R$, magnetic field at the center is $B_0 = 16~\mu\text{T}$. What will be the magnetic field on the axis at a distance $x = \sqrt{3}R$ from the center?

Light wave are incident from a medium of refractive index 2 making an angle $\theta$ with normal on to a medium of refractive index $2\sqrt{3}$. What should be the value of $\theta$ for which reflected wave and refracted wave will be perpendicular to each other.

When an unpolarized light falls at a particular angle on a glass plate (placed in air). It is observed that reflected beam is completely polarized the angle of refracted beam with respect to the normal is : (Given : $\tan^{-1}(1.52) = 57.3^\circ, \mu_{air = 1, \mu_{glass} = 1.52$)}

In Young's double slit experiment with two different set-ups, the fringe widths are equal. If the ratio of slit separation is $2$ and the ratio of wavelengths is $\dfrac{1}{2}$, find the ratio of screen distances in both set-ups:

Consider two statements given below: Statement-I: In YDSE, if distance between slits \& screen increases, fringe width also increases. Statement-II: If wavelength of light used in YDSE increases, fringe width also increases. Which of the following options is correct?

The intensity at spherical surface due to an isotropic point source placed at its center is $I_0$. If its volume is increased by $8$ times, what will be intensity at the spherical surface?

In a YDSE experiment, a transparent slab of refractive index 1.4 is placed in front of one slit. The fringe pattern shifts by 0.3 cm on the screen.
Given:
Screen distance = 60 cm
Slit separation = 1.5 mm
Thickness of the slab (in 碌m) is:

Two light sources of wavelengths $450\,\text{nm}$ and $550\,\text{nm}$ are used for YDSE with slit separation $2.25\,\text{mm}$ and distance between the slits and the screen is $1.5\,\text{m}$. Then the distance from central maxima for which minima of both wavelengths coincide is:

In a YDSE set up, a slab of width $ t $ is inserted in front of one slit. The interference pattern shifts by 0.2 cm on the screen. If the refractive index of the slab is 1.5, then $ t $ in $ \mu m $ (screen distance 50 cm and slits separation 1 mm) then $ N $ is ..............

Statement-1 : Planner wavefronts are incident on a prism, remain planner after passing through prism, but if planner wavefronts are passed through a pin hole then wavefronts may become spherical.
Statement-2 : If slit width is increased then curvature of wave front increases.

In the given logic circuit shown in the figure, inputs $ A $, $ B $, $ C $, and $ D $ are applied as shown. An LED is connected at the output. In which of the following combinations will the LED glow?