Πώς να υπολογίσετε το Ohm's Law

Τι είναι το Ohm's Law;

Ohm's Law states that the voltage across a conductor is proportional to the current flowing through it, with resistance as the proportionality constant: V = IR. Formulated by Georg Ohm in 1827, it is the most fundamental relationship in electrical engineering. It applies to ohmic materials at constant temperature; real-world components like diodes and transistors are non-ohmic.

Τύπος

V

voltage / current) — voltage / current)

IR

current × resistance) — current × resistance)

Οδηγός βήμα προς βήμα

1. 1V = IR (voltage = current × resistance)
2. 2I = V/R (current = voltage / resistance)
3. 3R = V/I (resistance = voltage / current)
4. 4Power: P = VI = I²R = V²/R
5. 5Units: V (volts), A (amperes), Ω (ohms), W (watts)

Worked Examples

Frequently Asked Questions