Question

How many electrons pass through a lamp in 2 minutes if the current is 300 MA Given charge on electeon is 1.6 × 10^ -19 C. ?

Answer 1

$\boxed{<u> </u><u>Solut</u><u>ion</u><u> </u>}$

Here .

$</strong><strong>I</strong><strong> = 300</strong><strong> </strong><strong>MA</strong><strong> = 300 \times {10}^{ - 3} </strong><strong>A</strong><strong> </strong><strong>\\ \\ e = 1.6 \times 10^{ - 19}</strong><strong>C</strong><strong> \\ \\ t = 2 \: minutes = 120sec \\ \\ the \: charge \: passing \: through \: the \: lamp \: in \:2 \: minutes \\ \\ q = </strong><strong>I</strong><strong> \times t = 300 \times 10^{ - 13} \times 120</strong><strong>C</strong><strong> \\ \\ suppose \: that \: n \: electrons \: pass \: through \: the \: lamp \: in \: 2 \: minutes \: \\ if \: e \: is \: charge \: on \: an \: electron \: then \: \\ \\ q = ne \\ or \\ n = \frac{q}{e} = \frac{300 \times 10^{ - 3} \times 120 }{1.6 \times 10^{ - 19} } = 2.25 \times 10^{20}$

Answer 2

Helo

Answer is 2.25

I HOPE IT IS RIGHT