Electric Circuit Builder
Build and test a simple electric circuit. Change voltage and resistance, switch the circuit ON, and observe current and bulb brightness.
1. Select voltage and resistance.
2. Close the switch.
3. Observe current and bulb brightness.
4. Record several readings.
๐ฏ Aim
To study the relationship between voltage, current and resistance in a simple electric circuit.
๐ Theory
Electric current flows when there is a complete path from one terminal of the battery to the other.
For an ideal resistor, the relationship between voltage, current and resistance is described by Ohm’s Law.
Therefore:
๐ฌ Circuit Components
๐ Battery: Provides electrical potential difference.
๐ก Bulb: Shows the effect of electrical power visually.
ใฝ๏ธ Resistor: Limits the current flowing through the circuit.
โก Switch: Opens or closes the electrical path.
โถ Ammeter: Measures current in amperes.
๐ Observation Table
| Trial | Voltage | Resistance | Current | Power |
|---|---|---|---|---|
| No observations recorded. | ||||
๐งช Try These Experiments
Experiment 1:
Keep resistance constant and gradually increase voltage.
Observe what happens to current.
Experiment 2:
Keep voltage constant and increase resistance.
Observe what happens to current.
Experiment 3:
Compare the brightness of the bulb at low and high electrical power.
๐ Procedure
- Set the battery voltage.
- Select the resistance.
- Close the switch.
- Observe the animated current path.
- Read the ammeter.
- Observe bulb brightness.
- Record the reading.
- Change voltage or resistance.
- Repeat the experiment.
๐ง Remember
Increasing voltage while keeping resistance constant increases current.
Increasing resistance while keeping voltage constant decreases current.
A circuit must be closed for continuous current to flow.