Active, Reactive and Apparent Power

Active Power The actual amount of power being used, or dissipated, in a circuit is called True power or Active Power or real power. It is measured in watt (W) or kilowatt (kW) or MW. It is symbolized by the capital letter P. It has been seen that the power is consumed only in resistance. Reactive … Read moreActive, Reactive and Apparent Power

Practical Current Source | V-I characteristics

Practically, the current sources don’t have infinite resistance across them but have some finite and high resistance. Due to the finite resistance, the practical current source shows some dependency on the voltage across it. So the current delivered by a practical current is not a constant as in case of the ideal one. A practical … Read morePractical Current Source | V-I characteristics

Practical Voltage Source | V-I characteristics

A voltage source is an active element which delivers power to the circuit. For example, batteries are the voltage sources. Practically, all the voltage sources have some internal resistance in contrast to its ideal case. A practical voltage source is modelled as, an ideal voltage source in series with its internal resistance indicated by a … Read morePractical Voltage Source | V-I characteristics

Classification of Element | Network Theory

In electrical circuits, the circuit elements can be classified as Linear and non-linear element Active and Passive element Unilateral and Bilateral element Time-variant and Time invariant element Linear and non-linear element An element or a system is said to be linear if it obeys the principles of additive and homogeneity properties. For linear elements, the current … Read moreClassification of Element | Network Theory

Difference Between Ground and Neutral

Ground or earth in a main (AC power) electrical wiring system is a conductor that exists primarily to help protect against faults and which in normal operation does not carry current. Neutral is a circuit conductor that may carry current in normal operation, and which is usually connected to earth. In-house wiring, it is the … Read moreDifference Between Ground and Neutral

Tellegen’s Theorem | Applications & Limitations

Tellegen’s Theorem This theorem states that algebraic sum of the power’s in any circuit (linear, non-linear, unidirectional, bi-directional, time-invariant and time-variant elements) at any instant is zero. It was published in 1952 by Bernard Tellegen. For verification of Tellegen’s theorem, KVL and KCL equations are used. Tellegen’s theorem works based on the principle of the law of … Read moreTellegen’s Theorem | Applications & Limitations

Millman’s Theorem | Limitations & Applications

Millman’s Theorem Case-1 The theorem states that if several ideal voltage sources V1, V2, V3,……., Vn in series with resistances R1, R2, R3,…….., Rn, are connected in parallel then the circuit may be replaced by a single voltage source Vout in series with the resistance Req. Let us consider a circuit having three sources i.e. n=3. … Read moreMillman’s Theorem | Limitations & Applications

Star to Delta Transformation/Y-Δ

In this article, we will see how to convert star configuration into delta configuration. This transformation permits three resistors which make a Y configuration to be replaced by three in a Δ configuration.  The equivalent delta resistance between any two terminals is given by the sum of star resistances between those terminals plus the product of these … Read moreStar to Delta Transformation/Y-Δ

Delta to Star Transformation/Δ-Y

In this article, we will see how to convert delta configuration into star configuration. This transformation permits three resistors which make a Δ configuration to be replaced by three in a Y configuration.  The resistance of each arm of the star is given by the product of the resistance of the two delta sides that meet … Read moreDelta to Star Transformation/Δ-Y

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