Basic Electrical Parameters And Their Relationship

Basic electrical parameters and their relationship

Current

The flow of charges in a conductor is called Current. It represents the quantity of electrons passing through a point in a circuit in a given time. lt;br>

Symbol: I

Unit: Ampere (A)

Measuring device: Ammeter

Voltage

The electrical potential difference between two points in a circuit is called Voltage. It`s often compared to water pressure in a pipe – the higher the voltage, the greater the potential for electrons to flow.

Symbol: V

Unit: Volts (V)

Measuring device: Voltmeter

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Resistance

Resistance is a measure of the opposition to current flow in an electrical circuit. It`s analogous to the narrowing of a pipe, which restricts the flow of water.

Symbol: R

Unit: Ohm

Measuring device: Ohmmeter

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Ohm’s Law

One of the fundamental principles governing electricity is Ohm`s Law, which states that the current flowing through a conductor between two points is directly proportional to the voltage across the two points and inversely proportional to the resistance between them. Mathematically, Ohm`s Law is expressed as:

​& &V = I R

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Where:

I is the current in amperes (A).

V is the voltage in volts (V).

R is the resistance in ohms (Ω&).

Understanding Ohm`s Law is crucial for analysing and predicting the behaviour of electric circuits.

Symbol

Unit

Measuring Device

Current

Voltage

Resistance