NTA-NET (UGC-NET) Electronic Science (88) Networks and Theorems-Network Elements Study Material (Page 2 of 4)
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Inductance and Capacitance
Voltage Across Inductor L
We know that the voltage induced across an inductor of inductance L due to a time varying current flowing through it is given by L di/dt. This result can be obtained using Maxwell՚s third equation which represents faraday՚s law. For understanding the derivation let us consider an inductor with a single turn carrying current through it as shown.
Maxwell՚s Third Equation
With mathematical steps as shown, Maxwell՚s third equation can be finally express…
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Measurement of Voltage, Current and Resistance: Ohm՚s Law, Power and Energy
When two oppositely charged bodies are connected by a wire, flow of electrons occurs from one body to the other. This movement of electrons constitutes a flow of electric current. The wire that allows the flow of electrons is called a conductor.
Electromotive force is an electric pressure that causes current to flow through a conducting wire. A conducting wire of large cross-sectional area allows more current to flow than a conductor with small cross-sectional area. Therefore, a conductor with a large cross-sectional area offers less resistance to flow of current than a conductor with a small cross-sectional area. Therefore, we can say that resistance is the opposition to the flow of current through a conduc…
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