Question

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.​

Answer 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:

`V=IR`

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.

`V=IR`

`9V=I* 90\Omega`

`I=0.1A`

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