Physics

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An electric kettle operates at 110V. What is the resistance of the kettle if the power is 1.5kW?


8.1 Ω

1.4 Ω

81 Ω

14 Ω


I'm stuck between A and B

  • Physics -

    v = i r so i = v/r
    P = i v = i^2 r = v^2/r
    1500 = 110^2/r
    r = 8.07 Ohms

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