Rate of Doing Work|COMMERCIAL UNIT OF ENERGY

RATE OF DOING WORK:POWER

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.

Units Of Rate Of Reaction And Expression Of Rate

The dimensional formula for rate of doing work is

The amount of usable energy that is available for doing work in a system is

What is the power of a body which is doing work at the rate of one joule per second?

Assertion : Time taken by a body to complete a given work has nothing to do with energy of the body. Reason : Because power of a body is the rate of doing work.