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

Era

Era

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Prathmesh Thakkar said:
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
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thank u so much for the quick reply! it helped a lot
 
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