List of top Physics Questions asked in JEE Main

If the radius of curvature of the path of two particles of the same mass are in the ratio $ 3:4 $, then in order to have constant centripetal force, their velocities will be in the ratio of:

The diameter of a sphere is measured using a vernier caliper whose 9 divisions of main scale are equal to 10 divisions of vernier scale. The shortest division on the main scale is equal to l mm. The main scale reading is 2 cm and second division of vernier scale coincides with a division on main scale. If mass of the sphere is 8.635 g, the density of the sphere is:

The temperature of a gas having $ 2.0 \times 10^{25} $ molecules per cubic meter at 1.38 atm (Given, $ k = 1.38 \times 10^{-23} \, \text{JK}^{-1} $) is:

Match List - I with List - II.

List - I(Number)	List - II(Significant figure)
(A) 1001	(I) 3
(B) 010.1	(II) 4
(C) 100.100	(III) 5
(D) 0.0010010	(IV) 6

Choose the correct answer from the options given below :

A body of m kg slides from rest along the curve of vertical circle from point A to B in friction less path. The velocity of the body at B is :

(Given, $ R = 14 \, \text{m}, \, g = 10 \, \text{m/s}^2 \, \text{and} \, \sqrt{2} = 1.4 $)

There are two cubical Gaussian surface carrying charges as shown. Find ratio of fluxes through surface $C_1$ and $C_2$:

The equivalent resistance of the following network is _____ $ \Omega $.

At what distance above and below the surface of the earth a body will have the same weight (take radius of earth as R)?

The ratio of heat dissipated per second through the resistance 5 ohm and 10 ohm in the circuit given below is :

If $\vec{a}$ and $\vec{b}$ make an angle $\cos^{-1}\left(\frac{5}{9}\right)$ with each other, then \[ |\vec{a} + \vec{b}| = \sqrt{2} |\vec{a} - \vec{b}| \quad \text{for } |\vec{a}| = n |\vec{b}|. \] The integer value of $n$ is _____.

A train is moving with a speed of 12 m/s on rails which are 1.5 m apart. To negotiate a curve radius of 400 m, the height by which the outer rail should be raised with respect to the inner rail is (Given, $ g = 10 \, \text{m/s}^2 $):

A square loop PQRS having 10 turns, area $3.6 \times 10^{-3} \, \text{m}^2$, and resistance $100 \, \Omega$ is slowly and uniformly being pulled out of a uniform magnetic field of magnitude $B = 0.5 \, \text{T}$ as shown. Work done in pulling the loop out of the field in $1.0 \, \text{s}$ is ______ $ \times 10^{-6} \, \text{J} $.

A liquid drop of radius R is divided into 27 identical drops. If the surface tension of the drops is T, then find work done in this process.

A metal wire of uniform mass density having length L and mass M is bent to form a semicircular arc and a particle of mass m is placed at the centre of the arc. The gravitational force on the particle by the wire is:

A vernier callipers has 20 divisions on the vernier scale, which coincides with 19^th division on the main scale. The least count of the instrument is 0.1 mm. One main scale division is equal to ____mm.

A parallel plate capacitor of capacitance $ 12.5 \, \text{pF} $ is charged by a battery connected between its plates to a potential difference of $ 12.0 \, \text{V} $. The battery is now disconnected and a dielectric slab ($ \varepsilon_r = 6 $) is inserted between the plates. The change in its potential energy after inserting the dielectric slab is ______ $ \times 10^{-12} \, \text{J} $.

Two conducting circular loops A and B are placed in the same plane with their centres coinciding as shown in figure. The mutual inductance between them is:

A heavy iron bar of weight 12 kg is having its one end on the ground and the other on the shoulder of a man. The rod makes an angle $60^\circ$ with the horizontal, the weight experienced by the man is :

A capacitor is made of a flat plate of area A and a second plate having a stair-like structure as shown in figure. If the area of each stair is $\frac{A}{3}$ and the height is d, the capacitance of the arrangement is: