Current in a resistor and potential difference

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SUMMARY

The discussion focuses on calculating the current in each resistor and the potential difference across a 200-ohm resistor in a given circuit. The equivalent resistance (Req) is determined using the formula 1/Req = 1/R1 + 1/R2 + 1/R3 + 1/R4, resulting in Req = 12.22 ohms. The current (I) is calculated as I = -240V / 12.22ohms, yielding I = -19.6 A, and the potential difference (deltaV) across the resistor is found to be deltaV = (-19.6A)(12.22) = -239 V. The solution requires knowledge of network theorems, including Kirchhoff's laws and source conversion methods.

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Homework Statement


In the circuit of figure p28.23, determine the current in each resistor and the potential difference across the 200 ohms resistor.

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Homework Equations



1/Req= 1/R1+1/R2+1/R3+1/R4
I=deltaV/R
deltaV= IR

The Attempt at a Solution



Req=1/(1/200ohms +1/80ohms+ 1/20ohms+ 1/70ohms)= 12.22 ohms

I=-240V/12.22ohms= -19.6 A
deltaV= (-19.6A)(12.22)= -239 V
Am I doing this completely wrong? If so what do I need to do?
 
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To solve this problem, you must know network theorems. Some of them are Kirchhoff law, source conversion method, etc.
 

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