List of top Physics Questions asked in JEE Main

A mass $m$ attached to free end of a spring executes SHM with a period of $1 \,s$ If the mass is increased by $3\, kg$ the period of oscillation increases by one second, the value of mass $m$ is ______$kg.$

If a copper wire is stretched to increase its length by $20 \%$ The percentage increase in resistance of the wire is _______$\%$.

A uniform solid cylinder with radius $R$ and length $L$ has a moment of inertia $I_1$ about the axis of the cylinder. A concentric solid cylinder of radius $R' = \frac{R}{2}$ and length $L' = \frac{L}{2}$ is carved out of the original cylinder. If $I_2$ is the moment of inertia of the carved-out portion, then $\frac{I_1}{I_2} =$
(Both $I_1$ and $I_2$ are about the axis of the cylinder.)

A spherical ball of radius $1 \, \text{mm}$ and density $10.5 \, \text{g/cc}$ is dropped in glycerine of coefficient of viscosity $9.8 \, \text{poise}$ and density $1.5 \, \text{g/cc}$. The viscous force on the ball when it attains constant velocity is $3696 \times 10^{-x} \, \text{N}$. The value of $x$ is:
(Given, $g = 9.8 \, \text{m/s}^2$ and $\pi = \frac{22}{7}$)

A solid cylinder of radius R and length L have moment of inertia I₁ and a second solid cylinder of radius R₂ and length L₂ cut from it have moment of inertia I₂. Find 11/I₂.

A cell of emf 90 V is connected across a series combination of two resistors, each of 100 $ \Omega $ resistance. A voltmeter of resistance 400 $ \Omega $ is used to measure the potential difference across each resistor. The reading of the voltmeter will be:

The logic gate equivalent to the given circuit diagram is :

An object is taken to a height above the surface of earth at a distance $\frac{5}{4} R$ from the centre of the earth Where radius of earth, $R =6400 km$ The percentage decrease in the weight of the object will be

The work function for two metals are 9eV and 4.5eV. Find the approx. difference between their threshold wavelength. (use hc = 1240 eV - nm)

The charge flowing in a conductor changes with time as $Q(t)=\alpha t-\beta t ^2+\gamma^3$ Where $\alpha, \beta$ and $\gamma$ are constants Minimum value of current is :

For a free body diagram shown in the figure, the four forces are applied in the ' $x$ ' and ' $y$ ' directions What additional force must be applied and at what angle with positive $x$-axis so that the net acceleration of body is zero?

A block of mass 100 gm is placed on a smooth surface, moves with the acceleration of a=2x, the change in kinetic energy can be given as $(\frac {x^n}{10})$, find the value of n.

The temperature of the body drops from 60°C to 40°C in 7 min. The surrounding temperature is 10°C. The temperature of the body drops from 40°C to T°C in 7 min. Find the value of T

If the position of a particle is changing with time as r=t²-2t (m). Find the velocity at t=2s.

Find the radius of the orbit corresponding to the 4th excited state in Li++. (a0 is the radius of first orbit in H-atom)

Let $\eta_1$ is the efficiency of an engine at $T _1=447^{\circ} C$ and $T _2=147^{\circ} C$ while $\eta_2$ is the efficiency at $T _1=947^{\circ} C$ and $T _2=47^{\circ} C$ The ratio $\frac{\eta_1}{\eta_2}$ will be :

In a thermodynamic process work done by gas is 1000 J & heat supplied is 200 J. Find change in internal energy of gas?

Ratio between rms speed of Ar to the most probable speed of $O^2$ at $27\degree C$ is

Choose the correct options based on the column shown below.