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Power(P) is rate of doing work1.Power is a Scalar Quantity2. formula:P=WD t3.S.I. Unit of Work is Watt=Js-1
Now lets do discussion
Tomorrow we will learn about commercial unit of work but now lets do discussion first
Lina: Energy consumed in a particular time periodis called power.
Discussion of Power
Very Good Lina and Ria.All the points said by you are absolutely correct
Ria: Means power is said to be 1 watt when 1J work is done in 1 second
Lina:Means if I am doing a work of 60J in 20 sec. power used by me is 60 = 3Watt 20
Lina: Hey do you know what is Average Power's Formula
Ria: Yes I know, It is TOTAL WORK DONETOTAL TIME TAKEN
Ria: Yes, Now we can find rate of doing work easily
THIS IS A STORY WHERE I AM GOING TO TELL YOU ALL ABOUT WHAT IS POWER?.......THE FIRST SCENE IN STORY IS SHOWING US THAT THERE IS A PHYSICS TEACHER WHO IS TEACHING FEW BASIC THINGS ABOUT POWER .
COMMERCIAL UNIT OF ENERGY= KWh1KWh= IKW.1hr =1000Wx3600sec. = 3.6x 106 J
NEXT SCENE IN STORY IS SHOWING THAT TEACHER IS TAKING DISCUSSION OF POWER AND WE GET TO KNOW TWO MORE POINTS ABOUT POWER.
Tina: what is energy possessed when 2kw of power is utilised in 1 Hr..
IN THIRD SCENE OF THE STORY WE SEE ONE NUMERICAL OF POWER AND LEARN HOW TO SOLVE IT..........
Ria: Now we have also learnt commercial unit of energy
IN THIS SCENE WE LEARNT COMMERCIAL UNIT OF ENERGY.....
IN THIS SCENE WE SEE ONE NUMERICAL OF COMMERCIAL UNIT OF ENERGY.......WE WILL KEEP ON LEARNING NEW THINGS IN THIS YEAR..
Ria: Energy Possessed is 2KW.1Hr=2000Wx 3600 sec.=72x105J
SEE YOU GUYS SOON...........
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