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October 16, 2025, 11:55:53 pm
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Flaming_Arrow

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few questions
« on: June 07, 2009, 11:09:47 am »
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shouldn't the period be 40ms?



shouldn't it be 11.52W because you have to not ?
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Mao

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Re: few questions
« Reply #1 on: June 07, 2009, 12:06:23 pm »
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1. you are correct, it should be 40ms

2. average power by AC source is calculated using RMS, not peak. http://vcenotes.com/forum/index.php/topic,13529.0.html
« Last Edit: June 07, 2009, 12:15:20 pm by Mao »
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Flaming_Arrow

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Re: few questions
« Reply #2 on: June 07, 2009, 12:08:52 pm »
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Thanks Mao
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Flaming_Arrow

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Re: few questions
« Reply #3 on: June 07, 2009, 12:28:32 pm »
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but wait, if there was a resistor and a Cell wouldnt u use V_peak to calculate power? not V_rms? im confused
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Damo17

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Re: few questions
« Reply #4 on: June 07, 2009, 01:19:05 pm »
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Quote from: Flaming_Arrow on June 07, 2009, 12:28:32 pm
but wait, if there was a resistor and a Cell wouldnt u use V_peak to calculate power? not V_rms? im confused

If they say 'how much power is dissipated' or 'what is the average power through the resistor'  or  'calculate the RMS power' then use use (or if the question permits )
However if they ask for the 'peak power across the resistor' then you use (or if the question permits )
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Flaming_Arrow

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Re: few questions
« Reply #5 on: June 07, 2009, 01:20:04 pm »
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Quote from: Damo17 on June 07, 2009, 01:19:05 pm
Quote from: Flaming_Arrow on June 07, 2009, 12:28:32 pm
but wait, if there was a resistor and a Cell wouldnt u use V_peak to calculate power? not V_rms? im confused

If they say 'how much power is dissipated' or 'what is the average power through the resistor'  or  'calculate the RMS power' then use use (or if the question permits )
However if they ask for the 'peak power across the resistor' then you use (or if the question permits )

oh k thanks
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