Electric socks, popular in cold weather, have a 90 ohms heating element that is powered by a 9 V battery. If the socks are on for 3 min

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Electric socks, popular in cold weather, have a 90 ohms heating element that is powered by a 9 V
battery. If the socks are on for 3 minutes (180 seconds), determine the amount of current used
to warm your feet while it is on.​

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  1. Answer : The amount of current used  to warm your feet is, 0.1 A

    Explanation :

    To calculate the current we are using ohm’s law:

    [tex]V=IR[/tex]

    where,

    V = voltage = 9 V

    I = current = ?

    R = resistance = 90 Ω

    Now put all the given values in the above formula, we get the current.

    [tex]V=IR[/tex]

    [tex]9V=I\times 90\Omega[/tex]

    [tex]I=0.1A[/tex]

    Therefore, the amount of current used  to warm your feet is, 0.1 A

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