Question

A stream of electron moves from the electron gun to a screen of a television. The electric current of the 10 μ A is constituted. Calculate the number of electrons striking the screen at every second. Also calculate magnitude of the charges striking the screen in one minute.

Answer 1

Answer:

I can not solve it

SORRY

Answer 2

Answer:

$6.25\times 10^{13}.$

$6\times 10^{-4}\ C.$

Explanation:

Given,

total current = 10 μ A

                   $=\ 10\times 10^{-6}\ A$

As we know that charge on one electron,

            $e\ =\ 1.6\times 10^{-19}$

From the formula,

charge = current x time

$=\ 10\times 10^{-6}\times 1$

            $=\ 10\times 10^{-6}\ C$

So the number of electron strike on the screen in one second can be give by,

$n\ =\ \dfrac{total\ charge}{charge\ on\ one\ electron}$

 $=\ \dfrac{10\times 10^{-6}}{1.6\times 10^{-19}}$

     $=\ 6.25\times 10^{13}$

So, the total number of electron strike on the screen will be $6.25\times 10^{13}.$

And magnitude of charge strike on the screen in one second will be,

$Q\ =\ 10\times 10^{-6}\times 60$

   $=\ 6\times 10^{-4}\ C$

So, the total magnitude of charge strike on the surface in one minute will be $6\times 10^{-4}\ C.$