Question

A current of 4Amp flows around a circuit in 10 sec.How much charge flows past a point in the circuit in this time? Also find the number of electrons pases in the circuit​

Answer 1

Answer:

We know

$i = \frac{q}{t} \\ \\ q = it \: = 4 \times 10 = 40 \: c$

Now charge of 1 electron is

$= 1.6 \times {10}^{ - 19} \: c$

So let there are n. electrons passes the circuit .

Given

$n \times 1.6 \times {10}^{ - 19} = 40 \\ \\ n = \frac{40}{1.6 \times {10}^{ - 19}} \\ \\ = 2.5 \times {10}^{20} \: electrons$