physics guru: electrical power transmission & distribution

PLUS TWO RESULT

C. O . TO IDENTIFY III PHASE A C AND I PHASE AC , TRANSMISSION OF POWER and DISTRIBUTION OF ELECTRICITY.

ACTIVITY-1
Write true or false? Correct the false statements,if any?

1)In Three phase generator, for each field magnet (field coil),three identical coils are placed
2)In Single phase generator,for each field magnet (field coil),three identical coils are placed
3)In Three phase generator, ,three pair of coils produced three different voltage
4)In Three phase generator, for each field magnet (field coil),three identical coils are placed in 60 degrees.
5)In Three phase generator, there is only phase difference in out put voltage.
6) Step up transformer is used as street transformer.

ACTIVITY-2

Some boys are playing cricket under power transmission tower.One of them pointed the four transmission lines of the tower and said ,"look that separate below line, it is neutral line."

1)In what voltage electricity produced in power station?
2)Do You agree with the statement of the boy?substantiate your answer?
3)Why thick almanium wire is used for transmission line?

Assignments
1) Draw graph of III phase A C in chart paper?
2) What are the drawbacks of power transmission ? How it minimize it?
3)Why electrical power is transmitted in A C ?
4)Write energy change taking place in the following power stations?
a)Kalppakkam Power house
b)Shabarigiri power house
c)Kayamkulam powerstaton
5)In star connection voltage of a phase line is 230V.But voltage between two phase line is 400V.Prove it mathematically.
VIDEO
A C GENERATOR

threephase generator

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