Electronics and Communication Engineering - Materials and Components
- Materials and Components - Section 1
- Materials and Components - Section 2
- Materials and Components - Section 3
- Materials and Components - Section 4
- Materials and Components - Section 5
- Materials and Components - Section 6
- Materials and Components - Section 7
- Materials and Components - Section 8
- Materials and Components - Section 9
Angular quantum number determines the angular momentum of electron.
Assertion (A): In a perfect capacitor, the current density is given by ω ∈0E0∈'rcos(ωt + 90°), where ∈r' is real part of dielectric constant.
Reason (R): In a perfect capacitor, dielectric losses are zero.
If dielectric losses are zero, the current in capacitor leads the applied voltage by 90°.
Also imaginary part of is ∈r is zero.
Assertion (A): For a solenoid having N turns, 
.
Reason (R): For all magnetic materials, B increases linearly with I.
Increase of B with I is not linear. Hence R is false.
Assertion (A): From the slope of the line in Figure, we can find permanent dipole moment of the molecules.
Reason (R): Total polarization of a polyatomic gas is given by P = N(ae + ai + μ2p / 3kT)E.
The slope of the line in figure is 
.
Since the total polarization is as given by the expression, we can find the permanent dipole moment of the molecules from the slope.
Assertion (A): If E is available energy state eV and EF is Fermi level, then probability of energy state E being occupied = 0.5.
Reason (R): 
.
E = EF, f(E) = 0.5.