TRY An electric oven of resistance 2002 drawn a current of 10A. it works 3 hours a daily. Calculate the weekly bill when

Question

TRY
An electric oven of resistance 2002
drawn a current of 10A. it works 3
hours a daily. Calculate the weekly
bill when energy is $0.48 per kwh
Hint: P=1?R
​

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Thu Nguyệt 5 years 2021-07-18T17:54:04+00:00 1 Answers 15 views 0

Answers ( )

  1. thucuc
    0
    2021-07-18T17:55:08+00:00
    Reply

    Answer:

    $2018.016

    Explanation:

    Applying,

    P = I²R………….. Equation 1

    Where P = power, drawn by the oven, I = current drawn by the oven, R = resistance of the oven.

    Given: I = 10 A, R = 2002 Ω

    Substitute this values into equation 1

    P = 10²(2002)

    P = 100(2002)

    P = 200200 W.

    P = 200.2 kW

    If the electric oven works 3 hours daily,

    Then the total time it works in a week = 3×7 = 21 hours.

    E(kWh) = P(kW)×t(h)

    E = 200.2×21

    E = 4204.2 kWh.

    If 1 kWh of energy cost $0.48,

    Then, 4204.2 kWh =  $4204.2(0.48) =  $2018.016

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