How do you calculate current in a changed parallel circuit?

In summary, the speaker is asking for help with a problem involving a parallel circuit with four equal resistances, one of which is removed. The question is how the current would change in this scenario.
  • #1
bobtheubs
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0
http://feat.putfile.com/profilepics/main/4/bobthebus-1313021205.jpg

Well this is my question, its not really homework or anything. I am just curious as to how you would do this. I was thinking that it would change at all. Since in a parallel circuit all the currents add up to the same number. So wouldn't you just divide 24 by 4, then minus 6 from the total I. Then times that by 3 and there you go. Thanks.
 
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  • #2
Could you write out the question please? I can't read that!
 
  • #3
Your voltage didn't change, but your resistance changed, so the current has to change.

The picture is hard to read, but I take it all the resistances are equal and the circuit is broken at P?

If so, you now have a parallel circuit with three branches instead of four. If you work both equations using R and simplify, the difference between them should be pretty obvious.
 

FAQ: How do you calculate current in a changed parallel circuit?

What is an electric circuit?

An electric circuit is a path or loop through which an electrical current can flow. It consists of a power source, such as a battery, wires that conduct the current, and various components such as resistors, capacitors, and switches.

What is the difference between series and parallel circuits?

In a series circuit, all components are connected in a single loop, and the current flows through each component in sequence. In a parallel circuit, the components are connected in multiple branches, and the current splits and flows through each branch simultaneously.

How do you calculate the voltage, current, and resistance in a circuit?

According to Ohm's law, voltage (V) equals current (I) multiplied by resistance (R). This can be represented by the equation V = IR. To calculate any of these values, simply rearrange the equation to solve for the desired variable. For example, to calculate current, divide the voltage by the resistance (I = V/R).

What is the purpose of a circuit breaker or fuse?

Circuit breakers and fuses are safety devices that protect against overloading a circuit. They are designed to interrupt the flow of electricity if the current becomes too high, preventing overheating and potential fires.

How do you troubleshoot a faulty circuit?

There are a few steps you can take to troubleshoot a faulty circuit. First, check all connections to make sure they are secure. Then, use a multimeter to test the voltage and current at different points in the circuit. If there is a significant difference in readings, it could indicate a problem with a specific component. You can also try replacing components one by one to see if the issue is resolved. If all else fails, consult a professional electrician.

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