Basic Electrical Principles: Ohm's Law and Power

This set of vocabulary flashcards covers fundamental electrical formulas for voltage, resistance, and power, including specific calculation examples provided in the lecture notes.

Resistance ($R$)

The ratio of voltage over current, calculated in the specific example as $R = \frac{12}{3} = 4$; expressed as $Resistance = 4 \text{ Ohms}$ or $4 \text{ }\Omega$.

Watts

The unit measurement of Power ($P$).

Ohm's Law (Voltage Formula)

The relationship expressed as $E = I \times R$, where $E$ is voltage, $I$ is current, and $R$ is resistance.

Ohm's Law (Resistance Formula)

The relationship expressed as $R = \frac{V}{I}$, used to calculate the resistance in a circuit.

Power formula ($P$)

The formula $P = I \times E$ used to determine the power in a circuit.

Power calculation example

A calculation where current ($I = 3\,A$) and voltage ($V = 12\,V$) result in $P = 3 \times 12 = 36\,Watts$.

Ohms ($\Omega$)

The unit of measurement for Resistance ($R$).