Volts, Amps, Ohms, and Watts

Voltage: is what makes electric charges move. It is the 'push' that causes charges to move in a wire or other electrical conductor. It can be thought of as the force that pushes the charges, but it is not a force. Voltage can cause charges to move, and since moving charges is a current, voltage can cause a current.

Volt: A "volt" is a unit of electric potential, also known as electromotive force, and represents "the potential difference between two points of a conducting wire carrying a constant current of 1 ampere, when the power dissipated between these points is equal to 1 watt."

Watt (Q) = V x I

{V=220 in india 2 phase}

{V=440 in india 3 phase}

Voltage (V) = R x I

Ampere: is a unit of measure of the rate of electron flow or current in an electrical conductor. One ampere of current represents one coulomb of electrical charge (6.24 x 10¹⁸ charge carriers) moving past a specific point in one second.

Resistance (Ohm): "Ohm(Ω)" is a unit of an electric circuit that is defined as the electrical resistance between two points of a conductor when a constant potential difference of one volt, applied to these points, produces in the conductor a current of one ampere, the conductor not being the seat of any electromotive force.

Watt: A "watt" is a measure of power. One watt (W) is the rate at which work is done when one ampere (A) of current flows through an electrical potential difference of one volt (V). Power (watts) is volts times amps. A few electrons under a lot of potential can supply a lot of power, or a lot of electrons at a low potential can supply the same power. Think of water in a hose. A gallon a minute (think amps) just dribbles out if it is under low pressure (think low voltage).

Watt = Voltage x Current

Voltage(V) = Resistance(R) x Ampere(A)

Example: if we have a heater having 5 Ampare show then how we get Resistance...

Now we know:

      V=220 volts          and          A(I)=5

Then we put formula

        R = V / I                R = 220/5 = 44Ω

        W = V x I               W = 220x5 = 1100J/s

                                                          = 110kJ/s

Some formulas and information:

          1kwh = 3.6x10^-6 J

With help of Nandan Kumar