Electricity and Ohm's Law

Vocabulary flashcards covering basic electrical concepts including current, resistance, voltage, units, and Ohm's law formulas.

Current ($I$)

The flow of electrical charge, defined in the notes as how many electrons pass every second. Its unit is Ampere ($\text{A}$).

Resistance ($R$)

A measure of how difficult it is for electrons to pass (the harder it is, the greater the resistance). Its unit is Ohm ($\Omega$).

Voltage ($U$)

The force that drives the current of electrons through a circuit. Its unit is Volt ($\text{V}$).

Ampere ($\text{A}$)

The unit of measurement for current ($I$).

Ohm ($\Omega$)

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

Volt ($\text{V}$)

The unit of measurement for voltage ($U$).

Ohm's Law Equation ($U = I \cdot R$)

The formula stating that voltage ($U$) equals current ($I$) multiplied by resistance ($R$).

Current Calculation Formula ($I = \frac{U}{R}$)

The rearranged formula used to calculate current ($I$) by dividing voltage ($U$) by resistance ($R$).