Physics
Ohm's Law
Investigate the effect of changing resistance on current.
Mission
Investigate the effect of changing the value of the resistance on the value of the electric current in the circuit.
Curriculum Alignment
| Standard | Syllabus code | Topic | Coverage | Grades | |
|---|---|---|---|---|---|
| NGSS | HS-PS3-6 | HS-PS3-6 (Ohm's law explicit: V, I, R mathematical relationship) | Full | 9–12 | |
| British / IGCSE | 0625 §4.2.4 | CAIE IGCSE Physics 0625 — 4.2.4 Resistance (Core #1 R=V/I, Core #2 experiment) | Full | 9–10 | |
| IB | DP B.5 | DP Physics — Theme B.5 Current and circuits (Ohm's law) | Full | 11–12 | |
| CBSE | Class 10 Ch 12 | CBSE/NCERT Class 10 Science — Ch 12 Electricity (Ohm's Law, named core topic) | Full | 10–10 | Prescribed practical |
| AERO / AP | AP Physics 2 Unit 11.3 | AP Physics 2 — Unit 11.3 Resistance, Resistivity, and Ohm's Law | Full | 11–12 |
Variables
What you change
- Resistance value
What you measure
- Current
What you keep constant
- Wire length
- Wire cross section
- Battery voltage value
- Temperature of wire
Equations
I = Electric current (A)
R = Electric resistance (ohm)
V = Voltage drop on resistor (V)
I = \frac{V}{R}
What You'll Need
- Breadboard 400 Tie Point
- Arduino Uno
- I2C LCD
- 25V Voltage Sensor Module
- Current Sensor ACS712
- 6V Battery Pack, 4x AA
- Resistor
Estimated Time
Virtual mode 8 minTest mode 12 minExercise mode 11 min
Mind-Blowing Fact
Ahead of his time.
For over a decade after the idea was first introduced, Ohm's law was rejected by the scientific community.
How You Can Run It
Virtual modeTest modeExercise modeView-only modeAccessibility modeTobii eye trackingVoice commandsArduino integrationAmericanBritishIB