Foundations of Physical Science

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# Foundations of Physical Science - PowerPoint PPT Presentation

Foundations of Physical Science. Workshop: Electric Circuits. Electric Circuits. CPO Science. What “flow of understanding” provides the necessary foundation for an understanding of electricity? What kinds of electric circuits can you build? How does electricity behave?. Key Questions.

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Presentation Transcript

### Foundations of Physical Science

Workshop: Electric Circuits

### Electric Circuits

CPO Science

What “flow of understanding” provides the necessary foundation for an understanding of electricity?

What kinds of electric circuits can you build?

How does electricity behave?

Key Questions
Light the Bulb!

What needs to happen to get the bulb to light?

Wooden Board

Wires of various lengths

On/Off switches

Bulbs and holder

Resistors – fixed and variable

Parts of our Circuits Kit
Place the bulb in a socket

Use one D cell

Make the bulb light!

Add a switch to conserve D cell energy

Use your finger to trace the path of electricity from one terminal of the D cell to the other terminal

Build a simple Circuit
Wire

Bulb

Battery

Switch

Parts of a Circuit

Symbols used for Diagramming

Add a second D cell to your circuit, right next to the first. Be sure to match up positive terminal with negative terminal

Do you notice any difference?

Add a second light bulb to the circuit, keeping only one pathway for electricity to follow

What do you observe now?

Let’s build on this…
Keep two D cells in the circuit

Wire up the 2 light bulbs so that there are two branches or pathways for electricity to follow

What differences do you observe?

Another way to light two bulbs
Resistance and Current

Inverse Relationship

Voltage

The amount of potential energy that each unit of charge has

V = voltage, measured in volts

I = current, measured in amperes, or amp

R = resistance, measured in Ohms, symbol W

Review
Using the Multimeter to measure Voltage
• Battery in a circuit
• Battery by itself
Using the Multimeter to measure Current
• Current in a circuit
• Multimeter completes the circuit