Energy and Power

**Energy is measured as, joule**. The force of 1 Newton lifting 1 metre is a newton metre which equals 1 joule. ( 1N*1m=1J )

EX. If a 10N book is lifted or dropped 1m 10J of work are done.

(10N*1m =10Nm = 10J )

** [1] Volt = J/c,**

Volt = electric potential energy

**1Volt** is measured as Joules of energy for every coulomb of repelling electrons.** (V = J/c)**

[2] Ampere = c/s

Ampere = electric current

The current is measured as the coulombs of electrons flowing in 1 second

(A = c/s)

[3] Watts =J/s

Watts = Power

** 1 Watt **is measured as the __energy (Joules) used in a second.__

*The energy of *1*Joule used for *1 *second = *1 *joule per second *

(Watt = 1 J/s=1W )

Electric energy and power is measured in the same way.

[1] volt = J/c [2] ampere = c/s [3] watt = J/s

These are related and calculated from each other as follows:

(This is especially useful if only partial information is given on the CSA label)

[1] Volt = Watt ÷ Amps

** V = **J/s ÷ c/s = J/s x s/c = J/c

[2] Ampere = Watts ÷ Volts

** A = **J/s ÷ J/c = J/s x c/J = c/s

[3] Watt = Volt * Ampere

**W = **J/s = J/c * c/s