Question

How many electrons constitute current of 1 micro ampere in 1 second
A) 6.25×10^6
B) 6.25×10^12
C) 6.25×10^9
D) 6.25×10^15

Answer 1

B is the correct answer 6.25 * 10^12

Answer 2

Answer:

Correct option is

B

6.25×10^12

Using   I=tq                    where q=n∣e∣

∣e∣=1.6×10−19 C         I=1 A           t=1 s

∴ Number of electrons    n=∣e∣It=1.6×10−191×1=6.25×10^12electrons