List of top Physics Questions

Speed of a transverse wave on a stretched string under tension \(T\) and linear density \(\mu\) is
The number of de Broglie waves associated with Bohr electron when it completes one revolution in its third orbit is
Young’s double-slit experiment is carried out by using green, red and blue lights, one at a time. The fringe widths recorded are \( \beta_G \), \( \beta_R \) and \( \beta_B \) respectively. Then

The energy stored in the capacitor after closing the key K is 

A person travels in a car from p to q with uniform speed u and returns to p with uniform speed v. The average speed for his round trip is
Electromagnetic waves of frequency \( 5 \times 10^{14} \, {Hz} \) lie in the
Two like charges kept in air medium experience a force \( F \), when they are separated by a certain distance \( r \). When the same charges are kept in a dielectric medium at the same distance of the separation, the force between them is 0.5F. The dielectric constant of the medium is
The ratio of the maximum kinetic energy to the maximum potential energy of a bob of a simple pendulum executing small oscillations is
A block of mass 3 kg executes simple harmonic motion under the restoring force of a spring. The amplitude and the time period of the motion are 0.1 m and 3.14 s respectively. The maximum force exerted by the spring on the block is
A particle executes a linear SHM with an amplitude \(a\) and angular velocity \(\omega\). The ratio between its acceleration amplitude and displacement amplitude is
In an LCR series resonance circuit driven by the alternating voltage \( V = V_0 \sin \omega t \), inductance \( L = 1 \, \mu H \), capacitance \( C = 1 \, \mu F \) and resistance \( R = 1 \, k\Omega \). The resonant angular frequency (in rad/s) is:
The velocity (\( v \))-time (\( t \)) graph for the motion of a body is a straight line making an angle \( 60^\circ \) with the time axis. Then the body is moving with an acceleration (in m\( s^{-2} \)) of:
If \( E \) is the electric field intensity between the plates of a charged parallel plate capacitor, energy stored per unit volume in it is (permittivity of free space = \( \epsilon_0 \))
Mobility \( \mu \) of an electron is related to average collision time \( \tau \) as: \[ \mu = \frac{e \tau}{m} \] (where \( e \) is the electronic charge, and \( m \) is the mass of the electron)
Whenever light travels from rarer medium into denser medium its
The elastic energy stored per unit volume in a stretched wire is: \[ \left( Y = \text{Young's modulus of the material of the wire}; \quad S = \text{stress acting on the wire} \right) \]
The ratio of radii of the circular paths of a proton and a deuteron when projected perpendicular to the direction of a uniform magnetic field with the same speed is
The length of the side of a cube is \( 1.1 \times 10^{-2} \) m. Its volume in \( m^3 \) up to correct significant figures is:
If the radii of two soap bubbles are respectively 2 cm and 3 cm, then the ratio of the excess pressures inside the soap bubbles is
When the number of molecules per unit volume of an ideal gas is \( 0.8 \times 10^{24} \), the mean free path length for its molecules is \( 2.2 \times 10^{-5} \, {m} \). If the number of molecules per unit volume is \( 1.0 \times 10^{24} \), then the mean free path is
A person standing in an elevator experiences weight loss when the elevator
An alternative form of Biot-Savart's law is

Choose the INCORRECT dimensions:

If \(\vec{a} = 0.4\hat{i} + 0.3\hat{j} + b\hat{k}\) is a unit vector, then the value of b is
The principle involved in the performance of a circus acrobat is the conservation of