Ohm's law

Current through a resistor

Change voltage and resistance to see how current changes in a simple circuit.

Ohm's law I = V / R

I = 5.0 V / 1000 ohm = 5.0 mA

Power equation P = V x I

P = 5.0 V x 5.0 mA = 25 mW

5.0V
1000 ohm
Voltage5.0 V
Resistance1000 ohm
Current5.0 mA
Power25 mW