Question

An electron gun in a TV set shoots out a beam of electrons. The beam current is 16 microA. How many
electrons strike the TV screen per second?
(A) 10^14
(B) 10^19
(C) 10^15
(D) 10^18

Answer 1

Answer:

I = Q/T

Q=IT

Q= 16× 10^-6 A × 1 Sec

Q= 1.6× 10^-5 Columb

Charge of a electron is e= 1.6×10^-19 C

n (number of electron )= Q/e

= 1.6×10^-5 / 1.6×10^-19

=10^14 (Answer )

Answer is option A