List of top Physics Questions

Find the angle of minimum deviation for an equilateral prism made of refractive index \( 1.732 \). What is the angle of incidence for the deviation?
Explain the classification of conductors, insulators, and semiconductors on the basis of energy bands.
Find the expression of the capacity of the parallel plate capacitor partly filled with dielectric substance. If the capacitor is charged by 100 μC and dielectric constant of the slab putting in it is 2.0, then find the induced charge on the dielectric slab in the capacitor.
Draw a suitable ray diagram of a compound microscope, when the image is formed at the least distance of distinct vision. Find the expression of magnifying power in this case.
Calculate the energy of a \( \text{He}^+ (Z = 2) \) in its first excited state.
Define critical angle. Explain working of optical fibre.
What are matter waves? Write de Broglie equation.
Draw the logic symbol of a NOR gate and write its truth table.
Obtain the formula for the electric potential on the axial line of an electric dipole.
The work function of a metal is \( 2.5 \times 10^{-9} \) joule. If the metal is exposed to a light beam of frequency \( 6.0 \times 10^{14} \) Hz, what will be the stopping potential?
Define drift velocity of free electrons and write the relation between drift velocity and current density.
In a transistor:
Define optical centre of a lens.
Write the minimum orbital angular momentum of the electron in a hydrogen atom.
The electric field of intensity \( \vec{E} = (3 \hat{i} + 4 \hat{j}) \, \text{N/C} \) passes through the plane of area \( \vec{A} = (10 \hat{i}) \, \text{m}^2 \). Find the electric flux.
As compared to \(^{12}_6C\) atom, how many extra protons and neutrons does the \(^{14}_6C\) atom have?
How much energy is released in mass defect of 1 amu?
The net resistance of an ammeter should be small to ensure that:
What do you understand by electromagnetic induction? State Faraday’s laws regarding electromagnetic induction.
What is LED? Explain its principle, construction and working.
As the temperature of a metal and of a semiconductor is increased, the:
What is the meaning of wavefront? Explain the laws of reflection by explaining Huygens' principle of wavefront.
The equation \( E = pc \), where \( E \), \( p \), and \( c \) represent energy, momentum, and velocity of light, is valid:
The equivalent resistance of the network shown in figure between A and B is:
Derive the formula for the capacitance of a parallel plate capacitor, partially filled with a dielectric.