If it takes you 5 minutes to dry your hair using a 1200-W hairdryer plugged into a 120-V power outlet,how many Coulombs of charge pass through your hair dryer?
A)120 C
B)300 C
C)60.0 C
D)1.00 C
E)5.00 C

Question

Quizplus · Accepted Answer

The charge (Q) in Coulombs can be calculated using the formula Q = It, where I is the current in amperes and t is the time in seconds. First, find the current using the power formula P = IV, where P is power (1200 W) and V is voltage (120 V). So, I = P/V = 1200W / 120V = 10A. The time is 5 minutes, which is 300 seconds (5 * 60). Therefore, Q = It = 10A * 300s = 3000 C.

If It Takes You 5 Minutes to Dry Your Hair