If a current of 8A passing through a circuit generates 14W of power, what is the resistance of the circuit?

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Kosyging1j7u · Accepted Answer

I would combine two laws I have memorised here: Ohm&#039;s Law,V=IRand the Power LawP=VII have a current, I, of 8 A (ampere) and a power, P, of 14W (watt). i have been asked for a resistance,   R  Ω (ohm).So I want a formula that includes only those three things. If I want to get rid of the V in the Power Law, I can replace it with what Ohm&#039;s Law says is equal to V=IR.So  P  =  (  I  R  )  ∗  I  =      I          2        ∗  RI need to rearrange to make R the subject, so I divide both sides by       I          2       and swap the sides:  R  =      P          I              2              =      14          8              2              =      14    64    =  0.22  Ω (rounded to two decimal places).

If a current of 8A passing through a circuit generates

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