Converting Watts to Volts: Maximum Current for a 3.5W Resistor

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Homework Help Overview

The discussion revolves around determining the maximum current for a 3.5 W, 220 ohm resistor, focusing on the conversion of watts to volts and the application of relevant electrical formulas.

Discussion Character

  • Exploratory, Mathematical reasoning

Approaches and Questions Raised

  • Participants discuss the relationship between power, voltage, and current, referencing formulas such as P=IV and P=I^2R. There is an exploration of how to manipulate these equations to find the maximum current.

Discussion Status

Some participants have provided guidance on the correct approach to use the formulas, while others have attempted calculations based on their understanding. There is acknowledgment of minor errors in calculations, but the method is generally accepted as valid.

Contextual Notes

Participants are working under the assumption that the voltage is unknown and are exploring how to derive it from the given power and resistance values.

haleyscavone
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What is the maximum current allowed in a 3.5 W, 220 ohm resistor?

The answer needs to be in amps so how would I convert watts to volts?
 
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Whats the formula for power dissapation in a resistor?
hint, V=IR and P=IV
 
Because the voltage was unknown you would use both equations and substitution right?
So P=I(IR) ---> P=I^2R

So 3.5/220=I^2
.0159=I^2
I=.1581

Is that correct?
 
Slight typo/mistake in your sqrt but yes - that's the correct method
 
thank you!
 

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