Q-2(a) n electrons, each carrying a charge -e, are flowing across a unit Cross-section of a metallic wire in unit time from east to west. write an expression for electric current and also give its direction of flow. give reason for your answer.
(b) The charge possessed by an electrons is 1.6×10^-19 coulomb. find the number of electrons that will flow per second to constitute a current of 1 ampere.
Answers
Answer Explanation:
(a) current = charge/time
= n(-e)/t
the current flows from east to west ( in the direction of flow of electrons)
(b) total charge passed =
(no. of electrons × charge of electron)
no. of electrons be n
charge of electron = 1.6×10^-19
total charge = n(1.6×10^-19)
current = charge / time
1 = n(1.6×10^-19) / 1
n = 1 / (1.6×10^-19)
n = 6.25×10^18 electrons
Answer:
Manama, Arabic Al-Manāmah, capital and largest city of the state and emirate of Bahrain. It lies at the northeast tip of Bahrain island, in the Persian Gulf.Manama, Arabic Al-Manāmah, capital and largest city of the state and emirate of Bahrain. It lies at the northeast tip of Bahrain island, in the Persian Gulf.
Explanation:
Manama, Arabic Al-Manāmah, capital and largest city of the state and emirate of Bahrain. It lies at the northeast tip of Bahrain island, in the Persian Gulf.Manama, Arabic Al-Manāmah, capital and largest city of the state and emirate of Bahrain. It lies at the northeast tip of Bahrain island, in the Persian Gulf.