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What are Amps, Volts and Watts?

What are Amps, Volts and Watts?

Let's imagine electricity like water in a garden hose. Here's how we can think about it:

Just like you can change how much water comes out of the hose or how hard it sprays, in electricity, you can change the amps, volts, and watts to make things work just right. It's a fun way to see how everything fits together!

Amps, Volts and Watts in technical terms?

Ampere (Amp): The ampere, quantifies electric current, representing the rate of electron flow through a conductor, denoted by 'I' in circuit equations.

Voltage (Volt): Voltage, represented by 'V', is a measure of the electrical potential difference between two points in a circuit, driving the movement of electrons through the conducting material.

Ohm: The ohm, symbolized by 'R', is the unit of electrical resistance within a conductor. It quantifies the opposition to electron flow, analogous to the constriction in a hose affecting water flow. Conductor materials like copper, having low resistivity, facilitate easier electron flow, akin to a wider hose permitting greater water throughput.

Watts: Watts measure the rate of energy transfer within an electrical circuit, denoted by "P" in electrical equations. Technically, power can be modulated by altering either current (I) or voltage (V). In practice, increasing either parameter proportionally increases the power output, according to the equation P = VI, where power scales linearly with both current and voltage, highlighting the direct dependency of power on these two variables within an electrical system.


Ohm's Law establishes a fundamental relationship in electrical engineering, expressed through the equation V = I * R, where V denotes voltage in volts, I signifies current in amperes, and R represents resistance in ohms. This equation quantifies how voltage across a component is directly proportional to the product of the current flowing through it and its resistance, providing a critical foundation for analyzing electrical circuits.

V = I * R

V = voltage (volts)
I = current (amps)
R = resistance (ohms)

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