List of top Physics Questions

A body starts from rest and moves with a uniform acceleration. The ratio of the distance covered by the body in the \( n^{th} \) second of its motion to the total distance travelled in \( n \) seconds is
A ray of light travelling through rarer medium is incident at a very small angle \( \theta \) on a glass slab and after refraction its velocity is reduced by 20%. The angle of deviation is
A body is rotating about its own axis. Its rotational kinetic energy is \( x \) and its angular momentum is \( y \). Hence its moment of inertia about its own axis is
Using Bohr's quantization condition, the rotational kinetic energy in the third orbit for a diatomic molecule is \( \left( h = \text{Planck's constant}, I = \text{moment of inertia of diatomic molecule} \right) \)
The space within the current carrying toroid is filled with aluminium of susceptibility \( \chi \). The percentage increase in the magnetic field \( B \) will be
The radii of circular orbits of two satellites \( A \) and \( B \) of the earth are \( R \) and \( R' \) respectively, where \( R \) is the radius of the earth. If the speed of satellite \( B \) is 6 V, then the speed of satellite \( A \) will be
The two coherent sources produce interference with intensity ratio 'b'. In the interference pattern, the ratio \[ \frac{I_{\text{max}}}{I_{\text{min}}} \] will be
The moment of inertia of a ring about an axis passing through its centre and perpendicular to its plane is \( I \). It is rotating with angular velocity \( \omega \). Another identical ring is gently placed on it so that their centres coincide. If both the rings are rotating about the same axis, then loss in kinetic energy is
A unit vector in the direction of resultant vector of \[ \mathbf{A} = -2\hat{i} + 3\hat{j} + \hat{k}, \quad \mathbf{B} = \hat{i} + 2\hat{j} - 4\hat{k} \] is
In the circuit shown in the figure, \( P \neq R \). The reading of the galvanometer remains the same with switch \( S \) open or closed. Then
Error in the measurement of radius of the sphere is 2%. The error in the calculated value of its volume is
Two wires of the same material and the same radius have their lengths in the ratio 2:3. They are connected in parallel to a battery which supplies a current of 15 A. Find the current through the wires.
Find the minimum wavelength of Paschen series. Given \(R=1.1\times10^{7}\,\text{m}^{-1}\).
What is the molar specific heat of an ideal monoatomic gas at constant pressure?
If Magnetic susceptibility is 2499, then find magnetic permeability.
The focal length of objective lens is \(50cm\), focal length of eyepiece is \(5cm\), tube length is \(15cm\) and least distance of distinct vision is \(25cm\). Find the magnifying power of the microscope.
Find the velocity of an electron in the fourth Bohr orbit of hydrogen atom.
Two blocks of masses \(3kg\) and \(1kg\) are placed on a smooth horizontal surface. A horizontal force of \(5N\) acts on the system. Find the contact force between the two blocks.
Three capacitors \(C_1=1\mu F\), \(C_2=2\mu F\) and \(C_3=3\mu F\) are connected in series across a \(10V\) battery. Find the potential difference across \(C_2\).
A wire of length \(5\,mm\) carries a current of \(5A\) along the X-axis. Find the magnetic field at a point on the Y-axis at a distance \(1m\).
Two long parallel wires carry currents \(5A\) and \(2A\) and are separated by \(0.2m\). Find the force per unit length between them.
A lens of power \(5\,D\) forms a virtual image having magnification \(2.5\). Find the position of the object.
Stopping potential is \(2.5\,V\) for light of wavelength \(400\,nm\). Find the work function of the metal.
The energy density of a magnetic field in a solenoid is \(10^{5}\,J\,m^{-3}\). Find the magnetic field.
A particle executes SHM with angular frequency \( \omega=0.5\,\text{rad s}^{-1} \) and amplitude \(A=5\,\text{cm}\). Find the acceleration when its displacement is \(x=4\,\text{cm}\).