Question

3. When one ampere current is passed through a Cu
wire for 10 sec., the number of electrons passing
through it is
1) 1.6 × 1019
3) 1 x 1016
2) 1 x 1035
4) 6.24 x 1019
​

Answer 1

GiveN :-

• One ampere of current passes through a copper wire for 10 s .

To FinD :-

• The number of electrons .

SolutioN :-

According to the question One ampere of current passes through a copper wire for 10 s . So , we know that current is , the rate of flow of charge .

★ According to the Question :-

$:\sf\implies \pink{ Current =\dfrac{Charge}{time}}\\\\\sf:\implies 1 A =\dfrac{n e }{t} \\\\\sf:\implies 1 A =\dfrac{n(1.6\times 10^{-19}) }{10 s}\\\\\sf:\implies n =\dfrac{10}{(1.6\times 10^{-19}) }\\\\\sf:\implies\boxed{\pink{\frak{ n_{(electrons)}= 6.25 \times 10^{19} }}}$