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What is Ohm’s Law in Electrical system

Ohm’s Law is the heart of electrical engineering, It is one of the best principle of Electrical circuit. Ohms Law is the basic principle used and all other rules are the based on it.

Ohm’s Law: Voltage equals current multiplied by resistance; it is shown in above Figure. The basic fact is that resistance creates/impedes the current flow. So, this Impedance creates the Voltage drop across the resistor that is proportional to current flowing through it.

Now, we have used the word Impedance, so Resistance is one of the quantity of Impedance. Two other quantities Inductor and capacitor are also part of the Impedance. Depending on the frequency of the power supply Inductor and capacitor also works as Resistor. Impedance is nothing but a resistance but keep in mind it causes delay in phase of the signal. So, Ohm’s Law also works on these quantities. So We can write Ohm’s Law as

V= I × Z

Where, V= Voltage, I= Current, Z= Impedance

Resistor, Inductor and Capacitor are everywhere in electrical circuit, but the main thing is how much it creates differance in circuit. We can replace Resistance by Impedance in any Equation by considering frequency of the signal.

During solution of the different faults in electrical system we founds frequent use of Ohm’s Law. So, We can say that Ohm’s Law is most popular Law of Electrical System.     

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