How Do You Calculate Peak Current for a Light Bulb?

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Homework Help Overview

The discussion revolves around calculating the peak current for a light bulb that operates at 75 watts with an RMS voltage of 110 volts. The subject area includes electrical circuits and power calculations.

Discussion Character

  • Exploratory, Mathematical reasoning, Problem interpretation

Approaches and Questions Raised

  • Participants discuss the relationship between RMS and peak voltage and how that can be used to find the peak current. There are attempts to clarify the equations needed to derive the peak current from the given information.

Discussion Status

Some participants have provided guidance on using the relationship between RMS and peak voltage to find the peak current. There is acknowledgment of a specific numerical answer, but the process to arrive at that answer remains under discussion.

Contextual Notes

One participant mentions a known answer for the peak current, but there is uncertainty about the method to reach that conclusion. The original poster expresses confusion regarding the calculations involved.

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[SOLVED] Determining Peak Current

Homework Statement



A light bulb uses 75 watts of power when a lamp is plugged into a wall socket (RMS voltage = 110 volts alternating at a frequency of 60 hertz)

Determine the electrical resistance of the light bulb filament.

Determine the peak current.

Homework Equations



f = 1/T - I=V/R - P=IV

The Attempt at a Solution



I determined the electric resistance to be 161.3 ohms. However, I don't know how to determine the peak current. Can someone please help?
 
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Someone please help. I know that the answer is 0.96 A.

I just don't know how to get to this solution and what equation to use.
 
If you know the rms voltage, you can find the peak voltage. What's the relationship between the two? Then from that you can find the peak current since you now know the resistance of the bulb.
 
Okay, I got the answer (actually it is .954 A). Thank you very much.
 

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