A table lamp draws a current of 200 mA when it is connected to a 120-V source. What is the resistance of the table lamp?

Question

A table lamp draws a current of 200 mA when it is connected to a 120-V source. What is the resistance of the table lamp?

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Khải Quang 5 years 2021-07-25T15:40:16+00:00 1 Answers 42 views 0

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  1. Xavia
    0
    2021-07-25T15:41:48+00:00
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    Answer: 600Ω

    Explanation:

    Voltage of source (V) = 120 Volts

    Current drawn by table lamp (I) = 200mA

    (Since 1 mA = 1 x 10^-3A

    200mA = 200 x 10^-3A)

    Resistance of table lamp (R)= ?

    Then, apply the formula for ohms law

    Voltage = Current x resistance

    i.e V = I x R

    120V = 200 x 10^-3A x R

    R = 120V / 200 x 10^-3A

    R = 600Ω (Ω is the symbol for ohms)

    Thus, the resistance of the table lamp is 600Ω

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