List of top Physics Questions

A light wave of wavelength 600 nm passes through a double-slit apparatus with a slit separation of 0.2 mm. What is the angular separation (in degrees) of the first-order bright fringe?
Two point charges, 4 µC and -3 µC (with no external field) are placed at (-6 cm, 0, 0) and (6 cm, 0, 0), respectively. The amount of work required to separate the two charges infinitely away from each other will be
A charge of magnitude \(3 \times 10^{-7}\) C is located at a distance of 0.09 m from a point P. Obtain the work done in bringing a charge of \(2 \times 10^{-9}\) C from infinity to the point P.
The electric field at a point on the axis of a uniformly charged ring of radius R at a distance x from its center is given by: \[ E = \frac{1}{4\pi\epsilon_0} \cdot \frac{2\pi kQx}{(x^2 + R^2)^{3/2}}. \] If x = 2R, what is the magnitude of the electric field?
A circular loop of radius 0.2 m carries a current of 4 A. What is the magnetic field at a point on the axis of the loop at a distance 0.2 m from the center?
If the amplitudes of a damped harmonic oscillator at times t=0, \(t_1\) and \(t_2\) are \(A_0\), \(A_1\) and \(A_2\) respectively, then the amplitude of the oscillator at a time of \((t_1+t_2)\) is
The radius of second orbit of hydrogen atom is same as that of orbit (n) of an ion (x). n and x are respectively
The equation for the RMS velocity is given as \[ v_{\text{rms}} = \sqrt{\frac{3RT}{M_0}} \] where \( R \) is the gas constant, \( T \) is the temperature, and \( M_0 \) is the molecular mass. If the temperature is increased, find the new RMS velocity \( v_{\text{rms}} \) when the temperature is doubled.}
The phenomenon responsible for the formation of mirage is
An endoscope is employed by a physician to view the internal parts of a body organ. It is based on the principle of
A bubble rises from the bottom of a lake \(90\) m deep. On reaching the surface, its volume becomes \((\text{Atmospheric pressure is }10\text{ m of water})\)
A sealed glass jar is full of water. When its temperature is decreased to \(0^\circ C\),
A vessel containing \(10\) liters of an ideal gas at a pressure of \(760\) mm of Hg is connected to an evacuated \(9\) liter vessel. The resultant pressure is
A gas is compressed at a constant pressure of \(50\,N/m^2\) from a volume of \(10\,m^3\) to a volume of \(4\,m^3\). Energy of \(100\,J\) is then added to the gas by heating. Its internal energy is
During the melting of a slab of ice at \(273K\) at atmospheric pressure
A siren emitting sound of frequency \(800\,Hz\) is going away from a static listener with a speed of \(30\,m/s\). Frequency of sound heard by the listener is \((\text{velocity of sound in air}=340\,m/s)\)
The beats are produced by two sound sources of same amplitude and of nearly equal frequencies. The maximum intensity of beats will be_____when compared to that of one source is.
The displacement of a particle executing SHM is \[ x=3\sin2t+4\cos2t. \] The amplitude of particle is
The amplitude of a simple harmonic oscillator is \(A\). When the velocity of particle is half of its maximum velocity, then its position is at
If a seconds pendulum on the earth is taken to a planet whose gravity is half of the gravity on earth, its time period on that planet is
An engine delivers \(1000\) watt of power with \(80%\) efficiency. The input power is
At her maximum height a girl in a swing is \(3m\) above the ground and at the lowest point she is \(2m\) above the ground. Her maximum velocity is
A body of mass \(2\) kg changes its velocity from \((3\hat i-4\hat j)\,m/s\) to \((6\hat j+2\hat k)\,m/s\). What is the change in kinetic energy of the body?
The time taken by a body to slide down the smooth inclined plane is \(4\) sec. The time taken by a body to slide \(1/4^{th}\) of the length of the plane is
A block of mass \(m\) is lying on an inclined plane. The coefficient of friction between the plane and the block is \(\mu\). The force required to move the block up the inclined plane will be