This table shows what happens when we put a resistor in series with a device (as shown in the diagram).
Device | R = 10 Ohm | R = 100 Ohm | R = 1000 Ohm | R = 10000 Ohm |
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LED
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Buzzer
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Motor
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Light bulb
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Interpret the table: how much current does each device need? (Note that the resistor limits the current to 3V/R).
By comparing this table to the one from the previous activity, what can you say about the resistances of the objects you studied there?