List of practice Questions

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.
Write the principle of Wheatstone's Bridge. Find the current measured by the ammeter in the given circuit diagram.
Explain the classification of conductors, insulators, and semiconductors on the basis of energy bands.
The electric field in an electromagnetic wave is given by \( E = 50 \sin \left( \omega t - \frac{x}{c} \right) \, \text{N/C}\). Find the energy contained in a cylinder of cross-section \( 10 \, \text{cm}^2 \) and length 50 cm along the x-axis.
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 the logic symbol of a NOR gate and write its truth table.
Calculate the energy of a \( \text{He}^+ (Z = 2) \) in its first excited state.
Define drift velocity of free electrons and write the relation between drift velocity and current density.
Obtain the formula for the electric potential on the axial line of an electric dipole.
What are matter waves? Write de Broglie equation.
Define critical angle. Explain working of optical fibre.
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?
Explain Biot-Savart law and find the unit of \( \mu_0 \) with the help of the Biot-Savart equation.
In a transistor:
The net resistance of an ammeter should be small to ensure that:
Write the minimum orbital angular momentum of the electron in a hydrogen atom.
Define optical centre of a lens.
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 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.
Draw the energy level diagram for hydrogen atom. Show the transitions of Lyman, Balmer, Paschen, Brackett and Pfund series in the diagram. In which region do these spectrum lie?
What do you understand by electromagnetic induction? State Faraday’s laws regarding electromagnetic induction.
What is the meaning of wavefront? Explain the laws of reflection by explaining Huygens' principle of wavefront.
What is LED? Explain its principle, construction and working.
The equation \( E = pc \), where \( E \), \( p \), and \( c \) represent energy, momentum, and velocity of light, is valid: