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rkoch rkoch
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11 years ago
How does a resistor affect the electrical current flowing through a given circuit that is supplied with a constant voltage?


I can't seem to figure this out! Please help if you can; thank you in advance.
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wrote...
#1
11 years ago
Well that is hard to answer without knowing what the circuit looks like and where you are measuring the current in the circuit.

In general, when the voltage is constant the current will decrease as the resistor value increases.
wrote...
#2
11 years ago
If the resistor is in series with the circuit, it will impede the flow of current, decreasing the current into the circuit.  If the resistor is in parallel with the circuit, that added resistor will provide another path for current thus increasing the current out of the voltage supply but not effecting the current into the circuit since the supply voltage is independent of current which means the circuit would see the same voltage across it.
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