List of top Physics Questions asked in JEE Main

Light is incident at such an angle so that minimum deviation takes place. Now a film of refractive index RI = \(n/2\) is stick on other face such that total internal reflection takes place on second surface. Find angle of prism :

As shown in the figure, six rods of same geometry are connected and maintained at temperatures \(100^\circ\text{C}\) and \(40^\circ\text{C}\). The temperature at points \(A\) and \(B\) are:

A soap bubble of diameter $7$ cm, its diameter is increased to $14$ cm. If change in its surface energy is $(15000 - x)\,\mu$J, find $x$. (Given surface tension = $0.04$ N/m)

A curve is given between the potential energy \(U\) of a particle and its position on the \(x\)-axis as shown. Given: \[ \tan\theta_1 = 1,\qquad \tan\theta_2 = 3,\qquad \tan\theta_3 = -\frac{1}{2} \] If \(F_{AB}\) is the force acting on the particle during motion from \(A\) to \(B\), similarly \(F_{BC}\), \(F_{CD}\) and \(F_{DE}\) are the forces during \(B\) to \(C\), \(C\) to \(D\) and \(D\) to \(E\) respectively, arrange the magnitudes of these forces in decreasing order.

A satellite is revolving around a planet in orbit radius of 1.5 R. Additional minimum energy required to transfer the satellite to the new orbit radius of 3R is (G and M are mass of satellite \& planet)

A particle moves along the \(x\)-axis and has its displacement \(x\) varying with time \(t\) according to the equation \[ x = c_0 (t^2 - 2) + c(t - 2)^2 \] where \(c_0\) and \(c\) are constants of appropriate dimensions. Which of the following statements is correct?

A particle is falling under gravity. Air resistance on particle is F = \(-\)kv. Find correct option :

There is a galvanometer of resistance $100\Omega$ and full scale current $I_g = 1$ mA. Find shunt resistance required to increase its range to $5$ mA.

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

For the given resistive network, the net resistance across \( AB = x \). Then find the value of \( x \).

A sinusoidal electromagnetic wave is given by \( \vec{E} = 20 \sin \left( \frac{2}{300} x - 10^6 t \right) \) propagating in a non-magnetic material. Dielectric constant of the material is.

For the given circuit, find the reading of the ammeter just after the key(s) is closed.

In the following configuration of charges. Find the net dipole moment of the system :

If the electric potential is \(V = 500\) volts at the point \((10,\,20)\) and the electric field is given by \[ \vec{E} = 10x\,\hat{i} + 5y\,\hat{j}\ \text{N/C}, \] find the potential at the origin.

Disk \( m_1 = 5 \, \text{kg} \) \& radius \( r_1 = 10 \, \text{cm} \) and disk \( m_2 = 10 \, \text{kg} \) \& radius \( r_2 = 50 \, \text{cm} \) are arranged as shown in the figure. Find the moment of inertia about an axis through the common tangent and parallel to the plane of the disks.

Electromagnetic wave with intensity \( I = 4 \times 10^{14} \, \text{watt/m}^2 \) is propagating in free space. Find the amplitude of magnetic field \( B_0 \). Given: \( c = 3 \times 10^8 \, \text{m/s}, \epsilon_0 = 8.85 \times 10^{-12} \, \text{C}^2/\text{N} \cdot \text{m}^2 \).

A ball of mass 100 g is projected with velocity 20 m/s at $60^\circ$ with horizontal. The decrease in kinetic energy of the ball during the motion from point of projection to highest point is:

In a circuit there is a battery with internal resistance \( r \) and Emf \( E \), which is connected to external load resistance \( R \) as shown. Find the value of \( R \) so that maximum power dissipates across \( R \).

Energy of first line of Lyman series - A Energy of second line of Balmer series - B Energy of first line of Balmer series - C Energy of second line of Lyman series - D What will be the correct decreasing order of energies of photons?