Basics of Magnetic Circuit

Magnetic Circuit is defined as the path followed by a Magnetic Flux. Magnetic Flux always has a tendency to follow low Reluctance path. The laws of Magnetic Circuit are quite similar to the Electric Circuit but the terms used in Magnetic Circuit analysis is different. Let us consider a Toroid having a magnetic path of … Read more Basics of Magnetic Circuit

Cause of Skin Effect in AC Conductors

The behavior of AC current is different than the behavior of DC current. When DC current flows through a conductor, it get uniformly distributed over the whole cross-section of the conductor but when AC current flows, it has a tendency to flow near the surface of the conductor. This behavior of AC current is popularly … Read more Cause of Skin Effect in AC Conductors

Why Capacitor is Generator of Reactive Power while Inductor an Absorber? Understanding Reactive Power

Consider an Inductive circuit and assume the instantaneous voltage be v = VmSinωt   Then the current will lag behind the voltage by some angle Ø and the instantaneous current will be as   i = ImSin(ωt-Ø)   Now to understand the concept of Reactive Power, we will calculate the instantaneous power. The instantaneous power … Read more Why Capacitor is Generator of Reactive Power while Inductor an Absorber? Understanding Reactive Power

Difference between Star and Delta Connection

As we know that Star & Delta Connection only possible in 3 phase system, so in our domestic system it is not possible, because generally all house hold electrical equipment are designed with single phase supply. Difference between Star & Delta: Star Connected System: Star connection is used where we require Neutral terminal to obtain … Read more Difference between Star and Delta Connection

Difference between Impedance and Admittance

Impedance is the resistive parameter offered to the flow of current in a circuit. Whenever current flows or electrons move through a closed circuit, due to collisions of electrons, resistance is offered to the flow of current. In a DC circuit, impedance is nothing but resistance. But in an AC circuit, along with resistance, inductance … Read more Difference between Impedance and Admittance

Why we Replace Voltage Source with Short Circuit and Current Sources with Open Circuits in Thevenin’s and Norton’s Theorem?

We don’t really replace the voltage sources with shorts rather we make the voltage of the voltage sources zero volts.  An ideal voltage source has zero internal impedance by definition of being “ideal”, so if we reduce its voltage to zero, we are left with a zero impedance source, which is a short circuit.  An … Read more Why we Replace Voltage Source with Short Circuit and Current Sources with Open Circuits in Thevenin’s and Norton’s Theorem?

Concept of Transient State and Steady State

The terms Steady State or Transient State is defined not only for electrical systems, but for many other physical systems also. The transient response does not depend on the source i.e. forcing function, applied. It is purely natural response. Mostly transient response is associated to on/off events. Previously the circuit is switched off. Now it … Read more Concept of Transient State and Steady State