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21 October, 01:06

What is the resistance of a 1500 w (120 v) hair dryer?

b. what is the current in the hair dryer when it is used?

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  1. 21 October, 01:26
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    A) power = IV

    From ohms law. I = V/R

    So, Power = VV/R

    Therefore, R (resistance) = VV : Power

    R = (120*120) : 1500

    = 9.6 ohs.

    b) From ohm's law, V=IR

    So, I = V/R

    = 120 : 9.6

    = 12.5 A
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