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    I cant see the link can you try posting it again
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    (Original post by BDunlop)
    I cant see the link can you try posting it again
    https://isaacphysics.org/questions/b...0-1b003bfb42b1
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    Power = V^2/ R(component)

    100*10=V^2

    Voltage across paralell circuit is the same, and it will be some fraction of 230.

    (1/10 + 1/R)^-1 * 230/ ((1/10 + 1/R)^-1 + R) = V

    substituite that into V, square root both sides and solve for R

    clue: between 50 and 60 ohms (and 3 SF)
 
 
 
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