Finding current in circuit

  • Thread starter Miike012
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  • #1
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I think the book is wrong.

Why is the current (which they denote IL) equal to Vs/(Req)

Where Vs = 458.3kV and Req is the equivalent resistance of the circuit equal to the sum of the two resistors in series ( Req = 220 + 20 = 240).

In there equation they left out the the resistor of 20 ohmes
 

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Answers and Replies

  • #2
759
40
No, the book answer is correct. They are finding the current in Rload by knowing Iload = Vload/Rload.
Now that you know the current, you can find the voltage drop across the 20 okm line resistance. Then you can find the source voltage.
 
  • #3
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No, the book answer is correct. They are finding the current in Rload by knowing Iload = Vload/Rload.
Now that you know the current, you can find the voltage drop across the 20 okm line resistance. Then you can find the source voltage.

Why is the current different through each resistor?
 
  • #4
Dick
Science Advisor
Homework Helper
26,260
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Why is the current different through each resistor?

It's not. That's what barryj is saying. They are the same. But the voltage drop is only measured against the load resistance. You can use that to find the source voltage.
 

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