Need help with this Physics Electricity question!
http://m.imgur.com/vxgOk7l
I'm really struggling with the last part
I'm really struggling with the last part
break the complicated network of resistors down into managable chunks that you know how to deal with by using the rules for combining resistances in series and in parallel to replace 2 or more resistors with one equivalent resistor.
the rule for series resistances is Requiv=R1+R2...
the rule for parallel resistances is 1/Requiv=(1/R1)+(1/R2)...
step 1: you have one resistor Z in series with the network consisting of WXY
if Z is 3 ohms then the resistance of the network WXY must be 2 ohms
step 2: combined resistance of the series resistors W and X in the upper branch = 3+3 ohms = 6 ohms
step 3: combined resistance of the resistor Y in parallel with the equivalent value for W and X... which must be equal to 2 (step 1)
1/Requiv=(1/R1)+(1/R2)...
1/2=(1/3) + (1/6)
1/2=(2/6) + (1/6)
1/2=3/6 which is true
might be helpful to redraw the circuit at each stage of simplification until you get the hang of it.
the rule for series resistances is Requiv=R1+R2...
the rule for parallel resistances is 1/Requiv=(1/R1)+(1/R2)...
step 1: you have one resistor Z in series with the network consisting of WXY
if Z is 3 ohms then the resistance of the network WXY must be 2 ohms
step 2: combined resistance of the series resistors W and X in the upper branch = 3+3 ohms = 6 ohms
step 3: combined resistance of the resistor Y in parallel with the equivalent value for W and X... which must be equal to 2 (step 1)
1/Requiv=(1/R1)+(1/R2)...
1/2=(1/3) + (1/6)
1/2=(2/6) + (1/6)
1/2=3/6 which is true
might be helpful to redraw the circuit at each stage of simplification until you get the hang of it.
Quick Reply
Related discussions
- Physical properties
- Physics, computer science or electrical engineering?
- isaac physics question
- GCSE AQA Physics Paper 1 and 2 Revision and Study Chat
- A-level Physics Study Group 2022-2023
- Help with (AQA) Thermal Physics / Electric Fields A-Level question?
- Is Physics A-Level even THAT hard?
- Electricity is mindboggling
- Use a simulator to plot the frequency response of the circuit
- Specific Charge
- A level options
- Can i do an electrical engineering degree with a college diploma
- Engineering degree if bad at practical work
- Edexcel GCSE Physics Paper 2 Higher Tier Triple 1PH0 2H - 16th June 2023 [Exam Chat]
- higher physics revision help
- becoming a civil engineer after a-level product design?
- I don't know what subject to pick
- Higher Physics Theory
- Access to higher education engineering
- Starry's GYG- Aspiring Vet medicine Student
