Question

The current in the electron beam of a typical video display terminal is 200 µa. How many electrons strike the screen each minute?

Answer 1

The number of electrons strike the screen each minute when thee current in the electron beam of a typical video display terminal is 200 µa is 7.5×10¹⁶.

How to calculate electric charge?

Electric charge is equal to the product of electricity current flowing and the total time. It can be given as,

$q=It$

Here, I is current and t is time.

The current in the electron beam of a typical video display terminal is 200 µa for one minute. Thus, the total charge is,

$q=200\times10^{-6}\text{ A}\times(60\text{ s})\\q=0.012\rm \;C$

The number of electron flow is the ratio of total charge to the charge of one electron. The charge on one electron is 1.6×10⁻¹⁹ C. Thus, the number of electron is,

$n=\dfrac{0.012}{1.6\times10^{-19}}\\n=7.5\times10^{16}$

Thus, the number of electrons strike the screen each minute when the current in the electron beam of a typical video display terminal is 200 µa is 7.5×10¹⁶.

Learn more about the electric charge here;

brainly.com/question/2373424

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