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Kara386
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Oh sorry! The source is connected between terminals A and B, which I took to mean in parallel across A and B although now I think about it that may not be what it means. Resistances are 10 ohms each. The problem is easy to solve once you know that no current flows between C and D, but I find it hard to see why no current flows there.Khashishi said:Your problem is underspecified. Where are the sources? What are the resistances?
Yes, identical. We were told to use the symmetry of the problem to solve it.Khashishi said:In general, there could be current. But, are the resistors all the same?
I have no idea why symmetry would prevent current flowing between C and D. All I've ever been told about short circuits is you find them by finding a path from the positive to negative terminal that avoids going through any load.Khashishi said:Well, what do you think symmetry tells you?
You can use Thevenin's theorem here. Remove the resistance in branch CD and find the Thevenin voltage Vcd. It will be zero.Kara386 said:I have no idea why symmetry would prevent current flowing between C and D. All I've ever been told about short circuits is you find them by finding a path from the positive to negative terminal that avoids going through any load.
Ah, that would lead to a sort of general principle that current doesn't cross a line of symmetry then. Doesn't flow from one side to the other. Thanks!protoslash said:- assume point A is connected to the positive source, and point B is connected to the negative source. Assume AB potential is V
- assume all resistance is the same
- do KVL around ADB loop. DB will have potential V/2
- do KVL around ACB loop. CB will have potential V/2 as well.
- Therefore with respect to B, Two points C and D have the same voltage potential, so no currents flow from C to D
I don't think you can call C-D short circuit since there is resistance between the two point. It just works out that the C and D have the same potential so no currents will flow.
Its more than that...Kara386 said:Ah, that would lead to a sort of general principle that current doesn't cross a line of symmetry then. Doesn't flow from one side to the other. Thanks!
A short circuit occurs when there is a low resistance connection between two points in an electrical circuit that are not meant to be connected. This causes a large, sudden flow of current, which can damage the circuit or start a fire.
A short circuit can be detected by using a multimeter to measure the resistance between the two points in the circuit. If the resistance is very low or close to zero, it indicates a short circuit. Additionally, if a circuit breaker or fuse repeatedly trips or blows, it can be a sign of a short circuit.
A short circuit can be caused by a variety of factors such as damaged insulation on wires, loose connections, faulty components, or even water or moisture in the circuit. It can also occur due to human error, such as using incorrect wiring or overloading a circuit.
To prevent a short circuit, it is important to properly install and maintain electrical systems. This includes using the correct wiring and ensuring all connections are secure. Regular inspections and maintenance can also help identify and fix any potential issues before they become a problem.
A short circuit can be dangerous as it can cause fires, electrical shocks, and damage to electrical equipment. In some cases, it can also lead to power outages and disruptions in electrical systems. It is important to address short circuits promptly to prevent any potential hazards.