Section 1- Electricity and Circuits
Section 1 - Activity 1
Point |
Bulb 1 (Lit / Unlit) |
Bulb 2 (Lit / Unlit) |
A |
Unlit |
Unlit |
B |
Unlit |
Unlit |
C |
Unlit |
Unlit |
D |
Unlit |
Unlit |
E |
Unlit |
Unlit |
F |
Unlit |
Unlit |
Conclusion- If the circuit is incomplete, the current can't flow in a circle so the bulbs don't light up
Section 1 - Worksheet 1
Which bulb lights first?
They all light at the same time
They all light at the same time
Neither bulb lights up (unplugged so not a complete circuit)
Only Bulb A lights up
Both bulbs light up
Section 1 - Activity 2
Make the bulb light using one cell, one bulb, and one wire
Conclusion- The current needs to be able to run through a circuit so you have to have the battery and the lightbulb touching to continue the circuit, and the wire is connected to the battery on one side and the lightbulb on the other.
Section 1 - Activity 3
Schematic Diagrams and Charge Flow
Section 2 - Activity 1
- It takes more time to discharge my lungs through a coffee straw (thinner than a soda straw)
- I exhale the same amount of air through both straws
- The speed of air particles is faster coming out of the soda straw because less time is needed to travel out of the straw
- A round bulb will have charge move faster through it because there is greater area so less resistance
Section 2 - Activity 2
Series Circuits
Series Circuits
To the right is a picture of a two-bulb series circuit. We found that the current for Circuit A was the greatest and the current for Circuit C was the smallest. This means the bulb in Circuit A was the brightest, and the least bright in Circuit C. Conclusion- The more lights connected in series, the greater the resistance |
Section 2 - Activity 3
Parallel Circuits
Parallel Circuits
The current in Circuit C is the highest, and the current in Circuit A is the lowest, but the brightness of the bulbs is the same because the current through each individual bulb is the same.
Conclusion- The more lights connected in parallel, the less resistance (more current). Total current increases, but current through each curb is the same.
Conclusion- The more lights connected in parallel, the less resistance (more current). Total current increases, but current through each curb is the same.
Section 2 - Worksheet
Maximum resistance = put bulbs in series
Minimum resistance = put bulbs in parallel
More charge flows through a single bulb circuit than through a two bulb circuit in a series circuit
Charge flows at a greater rate through 1 bulb than two bulbs in a series circuit
A single bulb shines brighter than either bulb in a two-bulb circuit in a series circuit
The total resistance of two bulbs is greater than a single bulb in a series circuit
The resistance of a wire is almost zero, while the bulb has a high resistivity
Minimum resistance = put bulbs in parallel
More charge flows through a single bulb circuit than through a two bulb circuit in a series circuit
Charge flows at a greater rate through 1 bulb than two bulbs in a series circuit
A single bulb shines brighter than either bulb in a two-bulb circuit in a series circuit
The total resistance of two bulbs is greater than a single bulb in a series circuit
The resistance of a wire is almost zero, while the bulb has a high resistivity