What is total internal reflection and critical angle? What is the working principle of Optical Fibre.
The intensity of the magnetic field \( B \) due to a current-carrying circular coil of radius 12 cm at its center is \( 0.5 \times 10^{-4} \, \text{Tesla} \) perpendicular to the plane of the coil upward. Calculate the magnitude and direction of current flowing in the coil.
Deduce the formula of torque on an electric dipole placed in a uniform electric field.
Calculate the energy equivalence of unified atomic mass unit.
Define the 'wavefront' of a wave.
Ionisation energy of Hydrogen atom is 13.6 eV. In a state where \( n = 2 \), what will be ionisation energy of its electron?
Deduce the dimensional equation of self-inductance.
State Ampere's Circuital Law.
Write the equation for the relationship between specific conductivity (\( \sigma \)) and drift velocity (\( v_d \)).
Diffusion current in a p-n junction is greater than the drift current in magnitude:
The equation \( E = pc \), (where \( E \) and \( p \) are energy and momentum respectively) is valid:
An electromagnetic wave propagating through vacuum, described by \( E = E_0 \sin(kx - \omega t) \), \( B = B_0 \sin(kx - \omega t) \), then: