Need your help with parallel circuits

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Homework Help Overview

The discussion revolves around calculating the total resistance of a heating element composed of three strips of resistive material connected in parallel, with a specified voltage of 12V and a power output of 40W.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants discuss the relationship between power, voltage, and resistance, with some questioning how power is distributed across the parallel strips. There are suggestions to visualize the circuit to aid understanding.

Discussion Status

The conversation includes attempts to clarify the relationship between power and resistance, with some participants offering guidance on the problem's straightforward nature. Multiple interpretations of the power-resistance relationship are being explored.

Contextual Notes

There are indications of confusion regarding the application of the formula and the assumptions about power distribution in parallel circuits. The original poster expresses uncertainty about the calculations and the implications of the given values.

goan
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I need to work out the total resistance of a heating element made up of 3 strips of resistive material in paralell. We are told that the unit is 12V and theheat is generated at a rate of 40W, I need to calculate the total resistance of the element. I kno I have to use the formula R=v²/r where R is the resistance, V is the voltage and r is the power(watts). i know that the voltage will be the same across all the strips but will the power, could you help me please?
 
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The power consumed is porportional to the total circiut resistance.

Thiis is a pretty straight forward problem, don't over think it.
 
Start by drawing off the circuit, that'll help.
 
goan said:
I need to work out the total resistance of a heating element made up of 3 strips of resistive material in paralell. We are told that the unit is 12V and theheat is generated at a rate of 40W, I need to calculate the total resistance of the element. I kno I have to use the formula R=v²/r where R is the resistance, V is the voltage and r is the power(watts). i know that the voltage will be the same across all the strips but will the power, could you help me please?



R(total)=3.6(ohm):blushing:
what is the problem here?
 
The power consumed is porportional to the total circiut resistance.

Inversely propotional.
 
thanks for your help guys
 

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