2.2 Ohm's Law
Ohm's Law, named for the German scientist Georg Simon Ohm, stats that as long as temperature stays the same:
- the resistance of a conductor stays constant, and - the current is directly proportional to the voltage applied. TASK
1) Read page 308 & 310 2) Check and Reflect: HAND IN 5-9 (independent), DISCUSS 1-4 (with partner), |
2.3 Circuitry & Schematics
Series vs. Parallel Circuits
The voltage in a series is divided by each individual load. The voltage in a parallel circuit is equal. For example, if the voltage of the battery in the above example is 10V, each lamp in the series would read at 5V while each lamp in the parallel circuit would read 10V.
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A drawing of a circuit is called a "schematic". Schematic drawings have 4 distinct symbols:
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Section Task:
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Use your understanding from the section to complete each step to the task. Please be advised that you should complete ALL the "building" components DURING class time. This is your priority as all other components can be completed for homework, should you require additional time.
Alternate Task (photos): |
Section Review
- Why is copper wire effective in electrical currents?
- What is the difference between a conductor and an insulator. What makes a "good" insulator?
- Electricity does not simply provide electrical energy. What are the potential byproducts?
- What are the units of measure for the quantities we have learned this unit? How do you measure them?
- Using the "waterfall" model for electricity, draw and label a digram to demonstrate voltage, resistance and current.
- If you want to adjust the light level in a room in your home, what would you need to add the circuit (hint - it's not a switch)
- Describe the function of a transistor, resistor, fuse and switch.
- Compare features of series and parallel circuits.
- What features are included in electrical circuits of devices that make them more convenient? Justify your opinion.