Question

A current of 4a flows through a bulb for 50 minutes. Find the number of electrons transported through the bulb wire.

Answer 1

I=Q/t

Q is charge in coulombs

I=1 amp

t=1 sec

so Q must be 1 coulomb

we know one electron has -1.6 x 10^(-19) coulombs negative is just the charge so we can ignore it.

(# electrons) * (1.6 x 10^(-19) coulombs) = 1 coulombs

(# electrons) = 1/(1.6 x 10^(-19))