ECE :: Materials and Components
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If n denotes principal quantum number, the angular quantum number l = 0, 1... (n - 1).
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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.
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Assertion (A): For a solenoid having N turns,
.Reason (R): For all magnetic materials, B increases linearly with I.
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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.
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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):
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If a piece of wood is placed in a magnetic field
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The apparent capacitance at a high angular frequency ω of an air cored capacitor having capacitance C and inductance L is given by
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In a true valence crystal, the bonding between the atoms is accomplished by the sharing of valence electrons.
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Which of the following are donor impurities?
- Gold
- Phosphorus
- Boron
- Antimony
- Arsenic
- Induim
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