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Electrical Conductivity of Materials: Quantum Mechanical Theory
We know that conduction current density, J = NVe = σ E
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December 27, 2015
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Showing posts from December, 2015
signal
Data vs Information vs Signal: Differences Explained Simply
[What is Data?] Data are simply values or sets of values of qualitative or quantitative variables, belonging to a …
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December 26, 2015
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digital communication
Noise in Communication Systems: Sources, Types & Signal Classification
What is Noise? The noise is the unwanted signals that tend to disturb the operation of a system and over whi…
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December 26, 2015
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semiconductor physics
Electrical Conductivity of Materials: Classical Electron Theory
According to classical theory (described by drude ) generally free electrons move randomly in all possible directions…
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December 21, 2015
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MCQ
Proof of Maxwell's First Equation: Modified Ampère's Law & Displacement Current (with MCQs)
Why does a magnetic field circle the gap of a charging capacitor, where no charge flows? Answering that puzzle led…
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December 20, 2015
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electromagnetic wave theory
Maxwell's Equations for Different Media
In the later half of the nineteenth century, Maxwell demonstrated that all previously established experimental fact…
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December 19, 2015
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MCQ
Bilateral vs Unilateral Circuit Elements: Definition, V-I Characteristics & Examples (with MCQs)
“Which of the following is a unilateral element?” — this one-mark question appears again and again in BCS (EEE), PG…
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December 19, 2015
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electrical
Active and Passive Components of an Electric Circuit (With Examples)
Circuit Components: An circuit component is any basic discrete device or physical entity in a system used to affect…
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December 19, 2015
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transmission line
Transmission Line Equations: Voltage and Current Relation Derivation
We know from the equivalent circuit of a transmission line (mentioned in a post before ) per unit length:
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December 16, 2015
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transmission line
Equivalent Circuit of a Transmission Line: RLGC Model, Characteristic Impedance & Propagation Constant (with MCQs)
A 230 kV power line and a 50 Ω coaxial cable look nothing alike, yet both are transmission lines described by the …
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December 16, 2015
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electronics
PN Junction Formation: Depletion Region and Barrier Potential
We knew there that the most important characteristic of a PN-junction or diode is its ability to conduct current in …
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December 14, 2015
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planar transmission line
Microstrip Line: Structure, Advantages and Disadvantages
Microstrip line (also known as microstrip or microstrip transmission line) is a type of electrical transmission line t…
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December 13, 2015
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planar transmission line
Stripline Transmission Line: Structure, Advantages & Disadvantages
Stripline consists of a flat strip of conducting material separated from two ground planes by a dielectric material a…
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December 13, 2015
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planar transmission line
Planar Transmission Lines: Microstrip, Stripline & Coplanar Waveguide (Design Example + MCQs)
Open any mobile phone, Wi-Fi router or GPS receiver and you will not find coaxial cables or waveguides inside — the…
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December 13, 2015
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