Question

If twenty thousand electrons are moved in 20minutes then what is the amount of electric current

Answer 1

Explanation:

Number of electron(n) = 20,000

Electric charge of one electron(e¯) = $1.6b\times {10}^{-19}$

Time(t) = 20 min = 20×60sec = 1200 sec

We know that,

Q = ne¯

= $20000 \times 1.6 \times{10}^{-19}$

= $2000 \times 16 \times{10}^{-19}$

= $32000\times{10}^{-19}$

= $32\times{10}^{-16}$

So, we have (electric charge) Q = $32\times{10}^{-16}$ c

Hence, i = $\frac{Q}{t}$

= $\frac{32\times{10}^{-16}}{1200 s}$

= $2.6\times{10}^{-18}$ A

Thus, electric current = $2.6\times{10}^{-18}$ A