Help with determining brightness of light bulbs in a circuit

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SUMMARY

The discussion focuses on determining the brightness of light bulbs in a circuit by treating them as resistors. The user applied Ohm's Law (V=IR) and Kirchhoff's Laws to analyze the circuit, assuming equal resistance of 2 ohms for each bulb and a 10V battery. The user calculated an equivalent resistance of 1.23 ohms, resulting in a total current of 8.125A. The conversation emphasizes the importance of using Kirchhoff's Laws to find the current in each branch of the circuit for accurate brightness ranking.

PREREQUISITES
  • Understanding of Ohm's Law (V=IR)
  • Familiarity with Kirchhoff's Laws
  • Basic knowledge of electrical circuits and resistors
  • Ability to perform circuit analysis
NEXT STEPS
  • Study Kirchhoff's Current Law and Kirchhoff's Voltage Law in detail
  • Learn how to calculate equivalent resistance in series and parallel circuits
  • Explore the relationship between current and brightness in resistive loads
  • Investigate the effects of wire thickness on circuit performance and safety
USEFUL FOR

Students studying electrical engineering, hobbyists working with circuits, and anyone interested in understanding the principles of current flow and brightness in electrical systems.

brom123
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Homework Statement



Rank in order of brightness, from brightest to dimmest.

Homework Equations



V=IR, Kirchoff's Laws

The Attempt at a Solution



I assumed the bulbs are supposed to be considered just as resistors, and that the more current through the resistor, the brighter the bulb. All bulbs (resistors) are of equal resistance, and I plugged in random values or 2 ohms for each resistor and 10V for the battery. I came up with 1.23 ohms for an equivalent resistance, so 8.125A for the current coming out of the battery. I am now stuck in determining how much current takes which path. Thank you for your help.
 

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Hi brom123! Welcome to PF!

have you used Kirchoff's laws to find the current in each branch? try it!
 
why is it not advisable to use a thin wire in the heating circuit?
 

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