Calculating the p.d. Across EC - Get an Explanation

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SUMMARY

The discussion focuses on calculating the potential difference (p.d.) across a circuit with resistors of 2 kΩ, 2 kΩ, and 1 kΩ. The participant concludes that the p.d. is 3 V after analyzing the voltage distribution. They express uncertainty about their calculations and seek clarification on simplifying the process of determining voltage drops across various points in the circuit.

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  • Understanding of Ohm's Law
  • Basic knowledge of series and parallel resistor configurations
  • Familiarity with voltage division principles
  • Ability to interpret circuit diagrams
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cheekymonkey
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Homework Statement


What is the p.d. across EC?



Sorry about the bad drawing.

Homework Equations





The Attempt at a Solution



I know you need to split the 4 V into the 2 k ohms, 2 k ohms and 1 kilo ohm. The answer is 3 V. I'm not sure how to get this answer. Someone explain please?
 

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What have you tried all ready? I'll help by saying that ruling out any voltage drop in the wire:

Voltage at A = Voltage at E = 4V
 
I'm really not sure. I've tried the V between C and D to be o.5 V and the V between E+F and F+G to be 1 V, but it doesn't work..

I've tried lots of other combinations too. Is there an easy way to calculate? I mean if I was in an exam this question would take me a while because all I am doing is guessing numbers.
 

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