Re: Dumb Dummy Qestion

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From: Vic Rosenthal (rakefet@rakefet.com)
Date: Tue Feb 18 1997 - 23:41:35 EST


Marty Watt wrote:

> RS does sell an 8 Ohm, non-inductive, 20W resistor. If I put 6 of
> these in series, does that mean it would handle 20W or 120W? 10W or
> 60W (half of calculated power under the various methods)?

Since the resistors are in series, the same current would have to flow
through all of them. Call this current I. Then each resistor would
dissipate I * I * 8 (P = I-square times R). If current happened to be
1.58 amps or so, each resistor would dissipate 20 watts, and the whole
string would be dissipating 120 watts.

Vic K2VCO


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