Any Type of Doubts in ENg Phy Chem Bio or Math....Ask me here!!!

[Tanvi Shah]

SOMETHING FROM ME..

 

[Tanvi Shah]

tnx for the lyk somya !

 

[somya]

tnx for the lyk somya !

 

[Tanvi Shah]

All the best for 2mrw's exam ppl! Hope everyone is well prepared! God bless

 

[Prathmesh Thakkar]

All the best for 2mrw's exam ppl! Hope everyone is well prepared! God bless

s2u

 

[KevinVasani]

Ty nd s2u!!

 

[Tanvi Shah]

Ty nd s2u!!

Hey Kevin.. Still LOLing abt wht u did in the morning wid rishabh! hahahhaa!!!

 

[Prathmesh Thakkar]

Hey Kevin.. Still LOLing abt wht u did in the morning wid rishabh! hahahhaa!!!

Whhattt.???????

 

[Tanvi Shah]

Whhattt.???????

it is an inside joke between Rishabh, Kevin n Moi.... nuthin you know abt Prathmesh Thakkar... so chillax!

 

[Prathmesh Thakkar]

it is an inside joke between Rishabh, Kevin n Moi.... nuthin you know abt Prathmesh Thakkar... so chillax!

Kkay i m out of it.....!!!!!

 

[Prathmesh Thakkar]

it is an inside joke between Rishabh, Kevin n Moi.... nuthin you know abt Prathmesh Thakkar... so chillax!

Dne wid chem n frnch.????

 

[Tanvi Shah]

yup finally!!! now m just goin through the type of essay topics these ppl r giving in MJ12.... n Holy Mother OF God!! pls change yr super-disgusting dp!!! its sick!

 

[Prathmesh Thakkar]

yup finally!!! now m just goin through the type of essay topics these ppl r giving in MJ12.... n Holy Mother OF God!! pls change yr super-disgusting dp!!! its sick!

sorry.!!! Hard luck.....It haunts yuh ryt??????

 

[Prathmesh Thakkar]

Soo Finally the Era ends.......CIE O/N 2012 Examinations...The run of the legends like myself.....Has ended....Now lets await the results......

 

[somya]

Soo Finally the Era ends.......CIE O/N 2012 Examinations...The run of the legends like myself.....Has ended....Now lets await the results......

ended?? there are still 5 papers left!!

 

[Prathmesh Thakkar]

ended?? there are still 5 papers left!!

Are u gonna stdy as mch for them....MCQs and ATP.????

 

[somya]

Are u gonna stdy as mch for them....MCQs and ATP.????

that's true... m not! but i still have to study for bs-tomorrow is paper 2!

 

[Prathmesh Thakkar]

that's true... m not! but i still have to study for bs-tomorrow is paper 2!

Ohkay all the best..!!!! i noe u ll score well......

 

[Era]

I have got some doubts! i hope someone would help me out!
i asked my teacher that why do we NEED ac current in transformers! She said AC is must because current in ac changes direction so thus it will change the magnetic field! but my question is that WHY do we need to change the magnetic field?
and why the coil should be insulated?
What helps transformers change its voltage?

 

[Prathmesh Thakkar]

I have got some doubts! i hope someone would help me out!
i asked my teacher that why do we NEED ac current in transformers! She said AC is must because current in ac changes direction so thus it will change the magnetic field! but my question is that WHY do we need to change the magnetic field?
and why the coil should be insulated?
What helps transformers change its voltage?

The coil is insulated so that eddy currents dont heat up the transformer causing it to increase the resistance of the conducting wire.....
Ac is need as DC would provide a magnetic field only in one direction.....Like for instance Mutual Induction.....It would be like pushing a magnet super fast though a coil so only once current is produced...
If AC was used....the magnetic field would vary say (50) times a sec....creating 50 pulses of current which cause a magnetic field a sec....... When magnetic fields of the primary and the secondary coil cut each other 50 times a sec.....current is produced which would not be possible with DC