List of top Physics Questions

The coefficient of friction between the road and the tyres of a cyclist is 0.1. The maximum speed with which he can take a circular turn of radius 2 m without skidding is ( \( g = 10 \) m/s\( ^2 \) )
A person standing in an elevator experiences weight loss when the elevator
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 

When a diode is reverse biased
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
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:
The lowest frequency of the air column in an open pipe of length \( L \) is \( v \) (velocity of sound in air)
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
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
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 = \( \epsilon_0 \))
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 elastic energy stored per unit volume in a stretched wire is: \[ \left( Y = \text{Young's modulus of the material of the wire}; \quad S = \text{stress acting on the wire} \right) \]
Electromagnetic waves of frequency \( 5 \times 10^{14} \, {Hz} \) lie in the
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 \(\vec{a} = 0.4\hat{i} + 0.3\hat{j} + b\hat{k}\) is a unit vector, then the value of b is
An alternative form of Biot-Savart's law is
The number of de Broglie waves associated with Bohr electron when it completes one revolution in its third orbit is
In a nuclear fusion process, the masses of the fusing nuclei are \( M_A \) and \( M_B \). Then the mass of the product nucleus \( M_C \) is related to \( M_A \) and \( M_B \) as
The electron concentration \( n_e \) and hole concentration \( n_h \) in semiconductor are related to the number of intrinsic charge concentration \( n_i \) as
An intrinsic semiconductor at \( T = 0 \, {K} \) behaves like
The energy required to excite the hydrogen atom from its first excited state to second excited state is: