Question

in a conductor electrons are flowing from B to a what is the direction of conventional current give justification for answer calculate the number of electrons constituting one coulomb of charge answer according to class 10 CBSE​

Answer 1

Current flows in a direction opposite to electron flow. So current flows from:

A to B

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Any amount of charge is given by the integral multiple of the charge of an electron. This means that

Q= ne

1. where, n is the no of electrons
2. Q is the charge
3. e is the charge of electron

Given, we have one coulomb,

1 = n × 1.6×10^-19

n = 1/1.6 × 10^-19

n = 6.25 ×10^18 electrons.

Answer 2

Answer:

A to B and 1/e or 6.25 × 10^ 18

Explanation:

We know direction of current is opposite to the direction of motion of electron. So if electrons are moving from B to A then current will be from A to B.

Now for 2nd question--

We know Q=ne

where Q= Total charge

n= no. of electrons and e =charge of electron

So n= Q/e = 1/ 1.6 × 10^-19 or 1/e

So numbers of electrons are 1/e or you can simplify even further then get,

n= 1×10^19/1.6

n = 0.625 × 10^19

Hence, n= 6.25 × 10^ 18 electrons which are flowing from A to B. ans.