Fill in the following blanks with suitable words :
(a) Power is the rate of doing …….
(b) 1 watt is a rate of working of one………… per ………..
(c) The electricity meter installed in our home measures electric energy in the units of ………
(d) The principle of ........... of energy says that energy can be ........... from one form to another, but it cannot be.............. or..................
(e) When a ball is thrown upwards,......... energy is transformed into ................energy.