Question

2. If 300 mA current passes through a lamp, how many electrons will pass through it in 1 minute? ​

Answer 1

Answer:

18 electrons

Explanation:

as the current is: no electron/time

I. e : I=Q/T

where I is current

Q is ne of elctrons

and T is time in second

sol:

substituting values

300*10^-3AMP =Q/60sec

Q=300*10^10-3*60

=18C

Answer 2

Answer:

Hey mate, Good evening ❤

#Here's ur answer...☆☆☆

Explanation:

$\boxed{ \huge{ \mathfrak{ \pink{answer...}}}}$

$\green{ \bold{you \: must \: know}} \\ current = \bold{ \boxed{ \red{\frac{charge \: }{time} = \frac{ne}{t} }}}$

$\bold{ \red{given... }}\\ current = 300 \times {10}^{ - 3} amperes \\ time = 60s \\ charge \: of \: each \: electron = 1.6 \times {10}^{ - 19} coulombs \\ \bold{ \red{\: to \: find....}} \\ no. \: of \: electrons \\ = > i = \frac{ne}{t} \\ = > 300 \times {10}^{ - 3} = \frac{n \times 1.6 \times 10 {}^{ - 19} }{60} \\ = > n = \frac{300 \times {10}^{ - 3} \times 60 }{1.6 \times {10}^{ - 19} } \\ = > n = 11250 \times {10}^{16} \\ \red{ \bold{ = > n = 1.125 \times {10}^{20} }} (\blue{answer...})$

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