EXAMPLE
A CAMCODER BATTERY PLATE CLAIMS THAT
THE UNIT STORES 2700mAHr AT 7.2V.
WHAT IS THE TOTAL CHARGE AND ENERGY
STORED?
CHARGE
THE NOTATION 2700mAHr INDICATES THAT
THE UNIT CAN DELIVER 2700mA FOR ONE
FULL HOUR
TOTAL ENERGY STORED
THE CHARGES ARE MOVED THROUGH A 7.2V
VOLTAGE DIFFERENTIAL
ENERGY AND POWER
2[C/s] PASS
THROUGH
THE ELEMENT
EACH COULOMB OF CHARGE LOSES 3[J]
OR SUPPLIES 3[J] OF ENERGY TO THE
ELEMENT
THE ELEMENT RECEIVES ENERGY AT A
RATE OF 6[J/s]
THE ELECTRIC POWER RECEIVED BY THE
ELEMENT IS 6[W]
HOW DO WE RECOGNIZE IF AN ELEMENT
SUPPLIES OR RECEIVES POWER?
IN GENERAL
