A hair dryer draws a current of 9.5 A.
(a) How much charge passes through the hair dryer in 3.5 min?
______C
(b) How many electrons does this represent?
______electrons
Voltage/ Charge question!!!?
Actually.....1 Ampere is 1 Coulomb per second
1A=1C/s not the other way around.
So, the amount of charge is given by:
xCoul = yAmp . zsec
Where y = 9.5 and z = 3.5 times 60 sec
so, x = 19950Coulombs
For part b), simply divide this by the charge on one electron
Voltage/ Charge question!!!?
Current is defined as the change in charge per unit time.
1 Coulomb (charge) = 1 ampere/second
3.5 minutes * (60 s/minute) = 210 s
x C = 9.5 ampere/210 seconds
The charge of a single electron is 1.6 * 10^-19C (see second reference below).
Take x from your previous answer and divide it by the charge per electron, and you will have the number of electrons.
So, electrons = x coulombs / (1.6 * 10^-19 coulombs/electron).
Voltage/ Charge question!!!?
a) Q=charge, I=current, t=time
Q=It =9.5*(3.5*60) =1995C
b) Charge of an electron= -1.6*10^-19
No. of electrons=1995/ (1.6*10^-19) = 3.192*10^-16
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