WHAT ARE THE stateOF ELECTRIC POWER AND its si unit?
Answers
Answer:
power =Energy/Time
Explanation:
It is a scalar quantity.so, it's si unit is watt,I.e joule/second. Hope this will help you a lot.
There are two main kinds of current: DC or direct current – a 'flow' of energy like you get from a battery; and AC, or alternating current (like from your wall outlets) – which reverses the direction of electrons, allowing current flow to turn on and off. But that current must be sourced or created.
The ampere (A) is a basic SI unit consisting of the amount of electric charge or number of electrons that pass a point in a electrical circuit in one second. The volt (V) is the electrical potential causing electrons to move through a wire. It is a joule of energy per coulomb of charge.
By Ohm's Law, V = IR, and so there are additional forms of the electric power formula for resistors. Power is measured in units of Watts (W), where a Watt is equal to a Joule per second (1 W = 1 J/s).