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wattage with resistors in series

mrmodify

Feb 13, 2010
157
Joined
Feb 13, 2010
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157
If I wire 3 2.5ohm 50 watt resistors in sereis the ohms will be 7.5 but what happens to the wattage. Does it add or stay at 50 watts. Was planning on using them for a speaker load when working on a amplifier.
 

(*steve*)

¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
Moderator
Jan 21, 2010
25,510
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Jan 21, 2010
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25,510
You can add the wattage in this case.

As long as all resistors have the same value and same rated wattage the load will be distributed evenly and thus simple addition is fine :)

If the wattages were different, or the values were different, then you may have to do a little more math.
 
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