Question

In a participate television tube, a beam of electrons is emitted .The beam current is 80 micro ampere .How many electrons strike the screen of tv every second? Also find the total charge striking the screen in 2 minute.

Answer 1

Answer:

I = 80 micro Ampere = 8 x 10^-5

t = 1 sec.

I = Q/t = ne/t

n = It/e =

=( 8 x 10^-5 x 1 )/(1.6 x 10^-19 )

= 5 x 10^14

Also, I = Q/ t

Q = It

= 8 x 10^-5 x 2 x 60

= 960 x 10-5 C

= 9.6 x 10^-3 C

Hence , 5×10^14 electroms strike the screen of tv every sec.

and , 9.6 × 10^3 C charge strikes the screen in 2 min.

Hope it helps you...

Mark it as Brainliest...