Question

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

Answer 1

Answer:

The charge pass through your hair dryer is 3000 C.

Explanation:

Given that,

Power = 1200 W

Voltage = 120 V

Flow time = 5 min

We need to calculate the current

Using formula of power

$P=VI$

$I=\dfrac{P}{V}$

Put the value into the formula

$I=\dfrac{1200}{120}$

$I=10\ A$

We need to calculate the charge pass through your hair dryer

Using formula of current

$I=\dfrac{Q}{t}$

$Q=It$

Put the value into the formula

$Q=10\times5\times60$

$Q=3000\ C$

Hence, The charge pass through your hair dryer is 3000 C.