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Ohm's Law
Voltage · Current · Resistance · V = IR
Ohmic Conductor
▶ Adjust sliders to change Voltage and Resistance · Watch current & graph update
Voltage (V)
6.0 V
Resistance (R)
3.0 Ω
Current (I = V/R)
2.00 A
Power (P = VI)
12.00 W
Current
2.00 A
Power
12.00 W
Ohm's Law
V = I × R
I = V / R
Energy (1 min)
720 J

Key Concepts & Formulas

Key Concepts

  • Ohm's Law: Current (I) is directly proportional to voltage (V).
  • Current is inversely proportional to resistance (R).
  • Ohmic conductors show a linear V-I relationship (straight line).
  • Resistance depends on the material, length, and temperature.

Essential Formulas

V = IR P = VI P = I²R E = Pt

Variable Meanings

  • V = Voltage (Volts)   I = Current (Amperes)
  • R = Resistance (Ohms)   P = Power (Watts)