# physics

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#1
If there is more than one switch in a circuit and say for example there's a switch around a resistor R1. When measuring total resistance of the circuit and the around the resistor R1 is closed, does this make the resistor independent of the whole circuit, and the resistance of resistor R1 can be neglected?
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1 month ago
#2
(Original post by RRAAAnn)
If there is more than one switch in a circuit and say for example there's a switch around a resistor R1. When measuring total resistance of the circuit and the around the resistor R1 is closed, does this make the resistor independent of the whole circuit, and the resistance of resistor R1 can be neglected?
Can you send a photo of an example circuit
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1 month ago
#3
(Original post by RRAAAnn)
If there is more than one switch in a circuit and say for example there's a switch around a resistor R1. When measuring total resistance of the circuit and the around the resistor R1 is closed, does this make the resistor independent of the whole circuit, and the resistance of resistor R1 can be neglected?
If you mean there is a switch (and nothing else) connected directly to the resistor (in parallel with it) then if the switch is closed that 'shorts out' the resistor, meaning you have bypassed it. So in that circuit you can ignore that resistor, as the combination of it and the short circuit gives a resistance value of zero.
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