List of top Physics Questions

A concave mirror has a focal length of 20 cm. An object is placed 60 cm in front of the mirror. Find the image distance.

If $ a(u + x^2) = x $ and $ y - x^3 = a^2 $, then $ \frac{dy}{dx} $ at $ x = 1 $ is:

A polaroid sheet is rotated between two crossed polarizers. The intensity of transmitted light would be maximum, when the angle between the axes of the first polarizer and the polaroid sheet is

A body of mass 100 g is moving in a circular path of radius 2 m on a vertical plane as shown in the figure. The velocity of the body at point A is 10 m/s. The ratio of its kinetic energies at point B and C is: (Take acceleration due to gravity as 10 m/s$^2$)

A block slides down a smooth inclined plane, and its acceleration is found to be $ \frac{g}{8} $. If $ g $ is the acceleration due to gravity, what is the angle of inclination $ \theta $ of the plane?

A pendulum completes 20 oscillations in 40 seconds. What is its frequency?

Two identical bodies of mass 1 kg each are moving towards each other with velocities of 5 m/s and 3 m/s, respectively. They collide elastically. What will be the velocity of the body initially moving at 5 m/s after the collision?

A simple pendulum of length 1 m is oscillating with an amplitude of 0.1 m. What is the maximum tension in the string if the mass of the bob is 0.2 kg? (Assume $ g = 10 \, \text{m/s}^2 $)

A hemispherical vessel is completely filled with a liquid of refractive index $ \mu $. A small coin is kept at the lowest point $ O $ of the vessel as shown in the figure. The minimum value of the refractive index of the liquid so that a person can see the coin from point $ E $ (at the level of the vessel) is:

A long straight wire of a circular cross-section with radius $ a $ carries a steady current $ I $. The current is uniformly distributed across this cross-section. The plot of magnitude of magnetic field $ B $ with distance $ r $ from the centre of the wire is given by:

The area enclosed between the parabola $ y^2 = 4x $ and the line $ y = 2x - 4 $ is:

When an object is placed 40 cm away from a spherical mirror an image of magnification $\frac{1}{2}$ is produced. To obtain an image with magnification of $\frac{1}{3}$, the object is to be moved:

A sinusoidal wave of wavelength 7.5 cm travels a distance of 1.2 cm along the x-direction in 0.3 sec. The crest P is at $ x = 0 $ at $ t = 0 $ sec and maximum displacement of the wave is 2 cm. Which equation correctly represents this wave?

A series LCR circuit is connected to an alternating source of emf $ E $. The current amplitude at resonance frequency is $ I_0 $. If the value of resistance $ R $ becomes twice of its initial value, then amplitude of current at resonance will be:

Which one of the following is the correct dimensional formula for the capacitance in F? M, L, T, and C stand for unit of mass, length, time, and charge.

Match List-I with List-II
\[\begin{array}{|l|l|} \hline \text{List-I (Physical Quantity)} & \text{List-II (Units)} \\ \hline \text{(A) Magnetic field} & \text{(I) J T$^{-1}$} \\ \hline \text{(B) Magnetic moment} & \text{(II) T m A$^{-1}$} \\ \hline \text{(C) Pole strength} & \text{(III) J T$^{-1}$ m$^{-1}$} \\ \hline \text{(D) Permeability of free space} & \text{(IV) Wb m$^{-2}$} \\ \hline \end{array}\]Choose the correct answer from the options given below:

A uniform wire of resistance 12 $\Omega$ is cut into three pieces in the ratio of length 1: 2: 3. Now the three pieces are connected to form a triangle. A cell of emf 8 V and internal resistance 5 $\Omega$ is connected across the highest of the three resistors. The current through the circuit is:

If the moment of inertia of a uniform solid cylinder about the axis of the cylinder is $ \frac{1}{n} $ times its moment of inertia about an axis passing through its midpoint and perpendicular to its length, then the ratio of the length and radius of the cylinder is

The work done by the force of gravity on a satellite moving in a circular orbit around the Earth is:

A body moves in a circular path with constant speed. Its kinetic energy:

The angle of a prism made of a material of refractive index $ \sqrt{2} $ is $ 90^\circ $. The angle of incidence for a light ray on the first face of the prism such that the light ray suffers total internal reflection at the second face is

Two blocks of masses in the ratio $ m:n $ are connected by a light inextensible string passing over a frictionless fixed pulley. If the system of the blocks is released from rest, then the acceleration of the centre of mass of the system of the blocks is (g = acceleration due to gravity)

An ideal gas has undergone through the cyclic process as shown in the figure. Work done by the gas in the entire cycle is _____ $ \times 10^{-1} $ J. (Take $ \pi = 3.14 $)

During the melting of a slab of ice at 273 K at atmospheric pressure:

Water falls from a height of 200 m into a pool. Calculate the rise in temperature of the water assuming no heat dissipation from the water in the pool. (Take $ g = 10 \, \text{m/s}^2 $, specific heat of water = 4200 J/(kg K))