How much current does a 310 W device draw when given a voltage of 120 V? – 3.6•10^4 A – 4.0•10^-2 A –

Question

How much current does a 310 W device draw when given a voltage of 120 V?

– 3.6•10^4 A

– 4.0•10^-2 A

– 4.2•10^2 A

– 2.6•10^0 A

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Thu Cúc 2 months 2021-08-03T20:21:31+00:00 1 Answers 12 views 0

Answers ( )

    0
    2021-08-03T20:23:05+00:00

    Answer:

    2.6\times 10^{0}

    Explanation:

    Power is expressed as rhe product of voltage and current hence P=IV where V is voltage across the circuit, I is current and P is power. Making current the subject of rhe formula then

    I=\frac {P}{V}

    Substituting 310 W for power and 120 V for voltage then

    I=\frac {310}{120}=2.58333333333A\approx 2.6A

    Giving the answer in scientific notation, then current is 2.6\times 10^{0}

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