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#44354 - 11/02/04 01:40 PM Another problem  
AndyP  Offline
Member
Joined: Aug 2004
Posts: 20
The resistance of a circuit is 35 Ohms. The input is 240V. What is the resulting amperage?

I get 6.8571428

WOuld it be just 6.86?


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#44355 - 11/02/04 02:00 PM Re: Another problem  
pauluk  Offline
Member
Joined: Aug 2001
Posts: 7,520
Norfolk, England
Close enough for all practical purposes.

This assumes a purely resistive circuit. If it contains inductance and/or capacitance then the current will be affected by the reactance.

Also, in some cases the load resistance can change when power applied. If you measure the resistance of a heating element when cold for example, you could expect it to change a little once power starts flowing and it gets hot.



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