Learning Objectives
- Understand that current increases when voltage increases.
- Understand that current decreases when resistance increases.
- Apply the formula I = V / R.
PhysicsMiddle / High School10 min
Ohm's Law Lab
Explore the relationship between voltage, current, and resistance using Ohm's law.
Battery
On
Bulb
Live Values
Current
0.75 A
Brightness
30%
Voltage
6 V
Resistance
8 Ω
Current vs voltage
Formula
I = V / R
I = 6 / 8 = 0.75 A
Try this
Set the circuit so the current is close to 1 A.
Current is low. Increase voltage or reduce resistance.
Ohm's law
What happened?
The bulb gets brighter when current increases.
Why?
Current increases with voltage and decreases with resistance according to I = V / R.
Tags
VoltageResistanceCurrentI = V / R