Question

A TV set shoots out a beam of electrons. The beam current is 10 A. How many electrons strike the TV screen in a minute?

• A. $16\times {10}^{19}$
• B. $16\times {10}^{-19}$
• C. $375\times {10}^{19}$
• D. $116\times {10}^{19}$

Answer 1

The correct option is C

$375\times {10}^{19}$

We know that current, $I=\frac{Q}{t}$ = $\frac{ne}{t}$

10 = $\frac{n\times 1.6\times {10}^{-19}}{60}$

Solving we get n = $375\times {10}^{19}$​