What is the unit measure of current?

It is the flow of free electrons in a conductor.

Who discover the relation among current, voltage and resistance?

What is the symbol of current?

It is a property of the basic practice of matter which like an atom, consist of portion. electron and neutron.

What is the formula in computing the power?

The electrical pressure that causes the electrons to move through a conductor (wire).

It is the product of voltage multiplied by the current with the unit of measurement being the Watt.

Referred to as the impedance to current flow of a material.