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
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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
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