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

  • Thread starter Thread starter cheekymonkey
  • Start date Start date
Click For Summary
To calculate the potential difference (p.d.) across points E and C, the circuit involves resistors of 2 k ohms and 1 k ohm connected to a 4 V source. The correct approach is to apply voltage division, which leads to a p.d. of 3 V across EC. The user expresses confusion over the calculations and attempts various voltage values without success. A clear method for solving such problems is needed to avoid guesswork during exams. Understanding voltage division and the arrangement of resistors is crucial for accurate calculations.
cheekymonkey
Messages
2
Reaction score
0

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?
 

Attachments

  • CIRCUIT.JPG
    CIRCUIT.JPG
    9.5 KB · Views: 455
Physics news on Phys.org
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.
 

Thread 'Help needed with Polarisation (Rotated Waveplates)'

(a) The polarisation pattern is elliptical with maximum (1,1) and minimum (-1,-1), and anticlockwise in direction. (b) I know the solution is a quarter-wave plate oriented π/4, and half-wave plate at π/16, but don't understand how to reach there. I've obtained the polarisation vector (cos π/8, isin π/8) so far. I can't find much online guidance or textbook material working through this topic, so I'd appreciate any help I can get. Also, if anyone could let me know where I can get more...
View full post »

Similar threads

What is the Effective Mass Equation for Excited Electrons in Units of Angstroms?
  • · Replies 10 ·
Replies
10
Views
2K
IV curve for voltage across shunt for probe current (Helimak experiment)
  • · Replies 1 ·
Replies
1
Views
1K
Engineering Why is the voltage source high potential into node 1 at -12 V in this op amp problem?
  • · Replies 15 ·
Replies
15
Views
2K
How Does Load Current Influence the Voltage Across a Battery's Terminals?
  • · Replies 5 ·
Replies
5
Views
2K
Calculating EMF and Load Resistance for a Motor
  • · Replies 11 ·
Replies
11
Views
2K
When Is the Potential Across a Capacitor Equal to That Across a Resistor?
  • · Replies 2 ·
Replies
2
Views
2K
Could someone help with this steady state capacitors questio
  • · Replies 2 ·
Replies
2
Views
1K
Understanding Josephson Oscillations: Solving for the Second Derivative of Theta
  • · Replies 8 ·
Replies
8
Views
2K
Fermi Energy level with respect to band gap energy
  • · Replies 1 ·
Replies
1
Views
4K
Practical Physics: Discharging a capacitor
  • · Replies 14 ·
Replies
14
Views
1K