Question

Calculate the value of current when a charge of 0.125 micro coulomb moves from 1 point to another
in a metal wire?

Answer 1

Given:

A charge of 0.125 micro coulomb moves from 1 point to another in a metal wire.

To find:

Value of current ?

Calculation:

Let's assume that the charge took 1 second to travel from one point to another in the metallic wire.

• Current is defined as the $\rm ins{t}antaneous$ rate of change of current.

Now, current be i :

$\therefore \: i = \dfrac{q}{t}$

$\implies \: i = \dfrac{0.125 \times {10}^{ - 6} }{1}$

$\implies \: i =0.125 \times {10}^{ - 6} \: amp$

$\implies \: i =0.125 \:micro \: amp$

$\implies \: i =0.125 \: \mu A$

So, current value is 0.125 micro-A.