1
Question
A tv set picture tube shoots out a beam of electron .the current due to this beam is 5mA per minute how many electron will strike t.v. screen every second?
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Solution
Dear Student,
As Given -
Current, I = 5 mA = 0.005 A;
Time, T = 1 sec;
Charge, Q = ?
As per the formula:
Charge = Current x Time
Q = 0.005 x 1
Q = 0.005 C
Now,
Apply,
Q = n x e
n x 1.6 x 10-19 = 0.005
n = 0.005/1.6 x 10-19
n = 0.003125 x 1019
No of electrons are 3.12 x 1016
Regards
As Given -
Current, I = 5 mA = 0.005 A;
Time, T = 1 sec;
Charge, Q = ?
As per the formula:
Charge = Current x Time
Q = 0.005 x 1
Q = 0.005 C
Now,
Apply,
Q = n x e
n x 1.6 x 10-19 = 0.005
n = 0.005/1.6 x 10-19
n = 0.003125 x 1019
No of electrons are 3.12 x 1016
Regards
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