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:Hi,
If I hook up a 100watt 3ohm resistor with a 10 watt 290ohm resistor in series, will the combination be able to dissipate 110 watts of heat or will the 10 watt resistor be a weak link? I'm trying to build something using parts from my junk box. That is why I ask. Info appreciated.
Bob Masse
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The 10-W resistor will be overloaded first.

With them in series, the current through both resistors will be the same, call it I. The power disipation is (I^2)R

What exactly are you trying to do?
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::Hi,
:If I hook up a 100watt 3ohm resistor with a 10 watt 290ohm resistor in series, will the combination be able to dissipate 110 watts of heat or will the 10 watt resistor be a weak link? I'm trying to build something using parts from my junk box. That is why I ask. Info appreciated.
:Bob Masse
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:

Bob,

Lets assume you want to run 1 amp thru the series combination. The 3 ohm resistor will dissipate 3 watts; the 290 ohm resistor will dissipate 290 watts. Heating is equal to: current (squared) x resistance. In a series string, the greater voltage (and hence, greater power) appears at the higher resistance element.
Rich

:
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::Hi,
:If I hook up a 100watt 3ohm resistor with a 10 watt 290ohm resistor in series, will the combination be able to dissipate 110 watts of heat or will the 10 watt resistor be a weak link? I'm trying to build something using parts from my junk box. That is why I ask. Info appreciated.
:Bob Masse
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::
:

:
:
;Thanks for info. That is what I suspected. I'm trying to build a selenium rectifier tester from a Sarkes- Tarzian book. It calls for adjustable resistors of various wattages. I was contemplating using fixed resistors in a voltage divider fashion from my junk box but it isn't practical now .
Bob Masse
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:

:
;:Bob,
:
:Lets assume you want to run 1 amp thru the series combination. The 3 ohm resistor will dissipate 3 watts; the 290 ohm resistor will dissipate 290 watts. Heating is equal to: current (squared) x resistance. In a series string, the greater voltage (and hence, greater power) appears at the higher resistance element.
:Rich
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:::
:::Hi,
::If I hook up a 100watt 3ohm resistor with a 10 watt 290ohm resistor in series, will the combination be able to dissipate 110 watts of heat or will the 10 watt resistor be a weak link? I'm trying to build something using parts from my junk box. That is why I ask. Info appreciated.
::Bob Masse
:::
:::
::
:
:

:
::
::
:;Thanks for info. That is what I suspected. I'm trying to build a selenium rectifier tester from a Sarkes- Tarzian book. It calls for adjustable resistors of various wattages. I was contemplating using fixed resistors in a voltage divider fashion from my junk box but it isn't practical now .
:Bob Masse
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:
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:;:Bob,
::
::Lets assume you want to run 1 amp thru the series combination. The 3 ohm resistor will dissipate 3 watts; the 290 ohm resistor will dissipate 290 watts. Heating is equal to: current (squared) x resistance. In a series string, the greater voltage (and hence, greater power) appears at the higher resistance element.
::Rich
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:::
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::::Hi,
:::If I hook up a 100watt 3ohm resistor with a 10 watt 290ohm resistor in series, will the combination be able to dissipate 110 watts of heat or will the 10 watt resistor be a weak link? I'm trying to build something using parts from my junk box. That is why I ask. Info appreciated.
:::Bob Masse
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Bob,
I have alot of variable resistors. Just exactly what size are you looking for? You said "several". I may or may not have some. Let me know. Send me an email.

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:::
::;Thanks for info. That is what I suspected. I'm trying to build a selenium rectifier tester from a Sarkes- Tarzian book. It calls for adjustable resistors of various wattages. I was contemplating using fixed resistors in a voltage divider fashion from my junk box but it isn't practical now .
::Bob Masse
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:::
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::;:Bob,
:::
:::Lets assume you want to run 1 amp thru the series combination. The 3 ohm resistor will dissipate 3 watts; the 290 ohm resistor will dissipate 290 watts. Heating is equal to: current (squared) x resistance. In a series string, the greater voltage (and hence, greater power) appears at the higher resistance element.
:::Rich
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:::::Hi,
::::If I hook up a 100watt 3ohm resistor with a 10 watt 290ohm resistor in series, will the combination be able to dissipate 110 watts of heat or will the 10 watt resistor be a weak link? I'm trying to build something using parts from my junk box. That is why I ask. Info appreciated.
::::Bob Masse
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::::
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:Bob,
:I have alot of variable resistors. Just exactly what size are you looking for? You said "several". I may or may not have some. Let me know. Send me an email.
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:Hi!Cindy,
I sent you an email.
Bob Masse
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