For the first question, a better answer is: "Resistance in Parallel Circuits

  • Context: High School 
  • Thread starter Thread starter stickplot
  • Start date Start date
  • Tags Tags
    Circuits Parallel
Click For Summary
SUMMARY

This discussion focuses on the principles of resistance in parallel circuits and the application of Ohm's Law in calculating current. It is established that if two legs of a parallel circuit carry approximately the same amount of current, their resistances are likely similar. Additionally, the calculation for current generated in Paul’s Super Marco video game, powered by 3 V batteries with a resistance of 15 Ω, is correctly derived using Ohm's Law (I = V/R), resulting in 0.2 A. The discussion also highlights the importance of understanding the correct application of the formula, specifically the need to avoid reversing voltage and resistance values.

PREREQUISITES
  • Understanding of Ohm's Law (I = V/R)
  • Basic knowledge of electrical circuits, specifically parallel circuits
  • Familiarity with resistance and its measurement in ohms (Ω)
  • Concept of conductance (G = 1/R)
NEXT STEPS
  • Research the characteristics of parallel circuits and their impact on total resistance
  • Explore advanced applications of Ohm's Law in complex circuits
  • Learn about conductance and its relationship to resistance in electrical engineering
  • Study common mistakes in applying Ohm's Law and how to avoid them
USEFUL FOR

Students studying electrical engineering, educators teaching circuit theory, and hobbyists interested in electronics and circuit design.

stickplot
Messages
83
Reaction score
0
ok this is a simple question and i have the idea but just not 100% sure
If two legs of a parallel circuit have about the same about amount of current, what can you say about the resistance of each of these legs?

My answer is that both legs most probable have the same object, there resistance would be very alike

any corrections?

Another question was


Paul’s Super Marco video game uses batteries that produce 3 V. If the circuitry produces a resistance of 15 Ω, how much current is generated in the game?

I came up with
I=v/r
I=3/15
.2=3/15
.2 current generated in game
but...
on the rubric for the question it says
Reversing Ohms and Volts in formula (15/3)=10 points
im not quite sure what they mean by that any help would be great
Thanks!
 
Physics news on Phys.org
Look at using conductance (G). G=1/R=I/V. Also, Wikipedia is a good place to find general information.
 

Similar threads

High School A question about induced current in LC circuits
  • · Replies 4 ·
Replies
4
Views
2K
High School What Happens When You Connect Different Voltage Batteries in Parallel?
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad An attempt to understand the associated variable conventions in circuits
  • · Replies 1 ·
Replies
1
Views
3K
High School Troubleshooting Battery Internal Resistance Measurements
  • · Replies 105 ·
4
Replies
105
Views
14K
High School Batteries in Parallel Arrangement
  • · Replies 11 ·
Replies
11
Views
3K
Undergrad Is this example incorrect in Agawal's book on electric circuits?
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Propagation of Errors, Ohm's Law
  • · Replies 6 ·
Replies
6
Views
5K
Current through a circuit when the key is open
  • · Replies 42 ·
2
Replies
42
Views
6K
High School Electric circuits formulas doubts
  • · Replies 5 ·
Replies
5
Views
3K
High School How can scalars like voltage, impedance, etc. be added like vectors?
  • · Replies 17 ·
Replies
17
Views
3K