About Electricity and Its Formulas


Understanding Electricity Electricity is the flow of electrical charge (usually electrons) through a conductor such as a cable.

🔌 Main Quantities in Electricity Voltage (V) Unit: Volt (V)

Function: The "push" that makes current flow Electric Current (I)

Unit: Ampere (A)

Function: The amount of electric current

Resistance (R)

Unit: Ohm (Ω) Function: The resistance to electric current


Basic Formula (Ohm's Law)

Explanation:

V = Voltage

(Volt) I = Current (Ampere)

R = Resistance


(Ohm)

Formula Derivative: I = V / R

R = V / I

Electrical Power (Power)

P = V I

Explanation: P = Power (Watt)

V = Voltage

I = Current Another formula:

P = I²R

P = V² / R


Electrical Energy Formula:

W = P × t

Note: W = Energy (Joules / (kWh)

P = Power (Watts)

t = Time (seconds / hours)


Example Problem

For example:

Voltage = 12V

Resistance = 6Ω

Then: I = V / R = 12 / 6 = 2 Amperes

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