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Published byCatalina Arnall Modified over 2 years ago

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Electronics Electronics is based on the flow of electrons from one point to another in a circuit. A Circuit is a loop of a conductor that permits electrons to flow around like racecars on a racetrack.

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Electricity Even though electricity is one phenomenon, we must look at 3 factors to determine the power being used

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1.) Resistance What is trying to slow or stop the electron/race car Unit of measurement is called Ohms and is represented by the Ω

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2.) Voltage What is making the electron/race car move around the circuit Unit of measurement is voltage and is represented by a V

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3.) Current The number of electrons/race cars per unit of time moving along the circuit. The unit of measure is amperage (amps) and is represented by amps or A

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Ohm’s law Shows the relation between all 3 Voltage ÷ Current = Resistance Voltage ÷ Resistance = Current Current ×Resistance = Voltage Example: 9 V applied to a 4.5 Ω light bulb will equal how man amps of current flowing through the light bulb?

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Electricity water analogy Electricity can be compared to water flow. Examples river, pressure washer Work together as a group to support or refute this statement. Explain and give examples of what would be the Resistance, Current, Electron, Voltage in the water flow example.

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High Current low Voltage

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Low Current High Voltage

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Watts the Unit of Power Watts = Current × Voltage So although the river has less voltage it may still have the same amount of power as the pressure washer. Imagine a watermill spinning on the river and another by the water pressure.

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