The power developed in a circuit is given by P = 10I-8I^2 where I is the current in amps. determine the current required to produce a power of 1.75 watts in th circuit. Many thanks.
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Hi You need to solve $\displaystyle 10I-8I^2=1.75$ which is a second degree polynomial equation. Do you know how to solve this type of equation ?
hi there, Thank you for your help. I dont know how to work this out. Thanks again could you show me please? thanks
Last edited by mr fantastic; Feb 20th 2009 at 01:00 AM. Reason: Merged posts
Originally Posted by running-gag Hi You need to solve $\displaystyle 10I-8I^2=1.75$ which is a second degree polynomial equation. Do you know how to solve this type of equation ? Originally Posted by Stazzer5 hi there, Thank you for your help. I dont know how to work this out. Thanks again could you show me please? thanks Re-arrange: $\displaystyle 8 I^2 - 10 I + 1.75 = 0$. Solve using the quadratic formula.
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