List of top Physics Questions

The refracting angle of a prism is A and refractive index is $\cot(A/2)$. The angle of minimum deviation is
The rate of change of current of $10\, A\, s^{ -1}$ in a coil produces an emf of 5 V. Then the self-inductance of the coil in henry is
The range of frequency bands used for television $VHF$ service is
The frequency order for $X-rays (A)$, $\gamma$-rays (B), $UV \,rays\, (C)$ is
The figure shows an experimental plot discharging of a capacitor in an $RC$ circuit. The time constant $\tau$ of this circuit lies between :
The external diameter of a $314\, m$ long copper tube is $1.2\, cm$ and the internal diameter is $1 \,cm$. Calculate its resistance if the specific resistance of copper is $ 2.2\times {{10}^{-8}}\Omega -m $
The equivalent inductance of two inductors is $2.4 \,H$ when connected in parallel and $10 \,H$ when connected in series. What is the value of inductances of the individual inductors?
The electric force between two point charges separated by a certain distance d in air is F.The distance at which they should be placed in a medium of relative permittivity k so that the force remain the same is
The current $(I)$ in the inductance is varying with time according to the plot shown in figure.
Which one of the following is the correct variation of voltage with time in the coil?
The coefficient of viscosity for hot air is
The capacitance of a spherical conductor of radius $1 \,m$ is
Reverse saturation current of diode
Photoelectric Effect and Raman Effect can be explained on the basis of
Monochromatic radiation emitted when electron on hydrogen atom jumps from first excited to the ground state irradiates a photosensitive material. The stopping potential is measured to be $3.57\, V.$ The threshold frequency of the material is
$[ML^{3}T^{-3}A^{-2}]$ is the dimensional formula of
In an $LCR$ circuit shown in the following figure, what will be the readings of the voltmeter across the resistor and ammeter if an $a.c.$ source of $220V$ and $100\, Hz$ is connected to it as shown?
In a Young?? double slit experiment with light of wavelength $\lambda$, fringe pattern on the screen has fringe width $\beta$. When two thin transparent glass (refractive index $\mu$) plates of thickness $t_1$ and $t_2$ $(t_1 > t_2)$ are placed in the path of the two beams respectively, the fringe pattern will shift by a distance
In a convex lens of focal length $F$, the minimum distance between an object and its real image must be
If radius of the $1^{st}$ orbit of $H$-atom is $0.0529 \,nm$ then the radius of its $3^{rd}$ orbit is
Find the voltage drop across a capacitor connected with a resistance and a battery of $60\, V$ in series after a long time.
Dimensional formula of $\Delta Q$, heat supplied to the system is
Vibrational energy of diatomic molecule corresponding to each degree of freedom is kT. For every molecule, vibrational degree of freedom is 2.
More energy is released in fusion than fission. More number of nucleons take part in fission.
Assuming the earth to be a sphere of uniform density, the acceleration due to gravity inside the earth at a distance of $r$ from the centre is proportional to
Assume that a neutron breaks into a proton and an electron. The energy released during this process is : (Mass of neutron $= 1.6725 ??10^{-27}\, kg$, Mass of proton $= 1.6725 ??10^{-27}\, kg$, Mass of electron $= 9 ??10^{-31}\, kg$ )