Question

a tv set shoots out a beam of electron . the beam current is 10 ua . how many electron strike the tv screen in each second . hpw much charge strike the screen in a minute​

Answer 1

Answer:

The charge of an electron is 1.6 x 10-19C.

Thus for a current of 10 mA, the charge going to screen in one scond is 10 mC

thus number of electrons, n = (10 x 10-3)/(1.6 x 10-19) = 6.25 x 1016

In a minute charge striking the screen = 10 * 60 = 600 mC