A potential difference of 12V is causing electrons to flow through a wire so that 20 x 1020 electrons pass a point in the wire in 1 minute.
i) What is the charge which passes the point in 1 minute, if the charge of each electron is 1.6 x 10-19C?
ii)What is the electric current in the wire?
Solution:
Number of electrons passes in t = 1 minute= 60 seconds is n = 20 x 1020 through a wire at a point.
(i) Charge on one electron, .
So, charge on n = 20 x 1020 electrons passing through the point in 1 minutes,
(ii) Current in wire,
Number of electrons passes in t = 1 minute= 60 seconds is n = 20 x 1020 through a wire at a point.
(i) Charge on one electron, .
So, charge on n = 20 x 1020 electrons passing through the point in 1 minutes,
(ii) Current in wire,