The current in an electric hair dryer is 11A Part A How much

The current in an electric hair dryer is 11A

Part A

How much charge flow through the hair dryer in 5.0 min ?

Express your answer using two significant figures.
Q =_____ C

Part B

How many electrons flow through the hair dryer in 5.0 min ?

Express your answer using two significant figures.
Ne =__________

Solution

Part A

Current = Amount of charge ( coulomb) flow per second

In 5 minutes (300) seconds, Amount of charge flowed = 11*300 = 3300 Coulomb = 33 x 10² Coulomb

Part B

Charge on an electron = 1.6 x 10^-19 Coulomb

No of electrones flowed in 300 seconds = Total charge flowed / Charge on an electron = (33 x 10²) / (1.6 x 10^-19)

= 20.62 x 10²¹ = 2.1 x 10²²