Question

how much work is done in moving a charge of 4C across two points having potential difference of 12V and calculate the number of electrons flowing in it ​

Answer 1

The work done in moving a charge is 48 joules and the number of electrons are $2.5\times 10^{19}$.

Explanation:

Given that,

Charge moving, q = 4 C

Potential difference, V = 12 volt

We need to find the work is done in moving a charge . We know that the work done in moving a charge from one position to another is called electric potential. It is given by :

$V=\dfrac{W}{q}\\\\W=V\times q\\\\W=12\ V\times 4\ C\\\\W=48\ J$

Let there are n number of electrons flowing through it. It is given by :

q = ne

$n=\dfrac{q}{e}\\\\n=\dfrac{4}{1.6\times 10^{-19}}\\\\n=2.5\times 10^{19}$

So, the work done in moving a charge is 48 joules and the number of electrons are $2.5\times 10^{19}$.

Learn more,

Electrical potential

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