List of top Physics Questions

A voltmeter of resistance \( 300\,\Omega \) measures up to \( 150\,\text{V} \). Find the value of the shunt required to convert it into an ammeter capable of measuring \( 8\,\text{A} \).
State Lenz’s Law. Show that it is a consequence of the Law of Conservation of Energy.
Derive the Lens Maker’s Formula for a thin convex lens.
State Gauss’s Theorem. Use it to derive the electric field intensity due to an infinitely long straight charged wire.
Why can high or very low resistance not be measured accurately using the Wheatstone bridge principle?
Define the critical angle and state the conditions required for Total Internal Reflection (TIR).
What is the SI unit of magnetic flux?
If the distance between two point charges is doubled, the electrostatic force between them becomes—

Define the dielectric constant of a medium.

Define Curie temperature in magnetism.

Using Gauss’s law, obtain an expression for the electric field at a point due to a uniformly charged infinite plane sheet.

State Gauss’s law. Determine the electric field intensity at a point due to an infinitely long uniformly charged straight wire.

State Huygens’ Principle. Use it to prove the laws of reflection or laws of refraction at a plane surface.

For the given set of measurements, find the relative error. \[ 20.00,\ 19.75,\ 18.25,\ 17.01 \]
For a particle executing simple harmonic motion, the restoring force is proportional to:
The eigenvalues of the Hamiltonian operator represent the:
Which of the following Maxwell’s equations represents Faraday’s law of electromagnetic induction?
For an ideal gas undergoing an adiabatic process, which quantity remains constant?
Which of the following solids has a completely filled valence band and a large band gap?
Which particle is emitted during beta-minus decay?
A conducting rod of mass \( m \) and length \( l \) is moving on an infinite pair of conducting rails as shown. Conducting rails are connected to a resistance \( R \) at one end. Motion is in the vertical plane and horizontal magnetic field in the region is \( B \). Find the terminal speed of the rod.
After release, the blocks moves 81 cm in 9 seconds. Find moment of inertia of the pulley :
(Given $m_{1} = 400$ gm, $m_{2} = 350$ gm, R = 2 cm, g = 10 m/s$^2$)
Density of water at 4\(^\circ\)C is 1000 kg/m\(^3\) and at 20\(^\circ\)C it is 998 kg/m\(^3\). If 4kg of water is heated from 4\(^\circ\)C to 20\(^\circ\)C, the change in internal energy of water is : (Given : specific heat capacity of water = 4200 J/kg K, Atmospheric pressure P = \(10^5\) Pa).

Two lenses one biconvex and other plano concave have same magnitude of power. The refractive indices of their materials are 1.5 and 1.7 respectively. If the radii of curvature of the lenses are as shown. find the ratio : \(\frac{R_1}{R_2}\) : 

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.