Question { Essar, 9157 }

in transfomer which type of oil is use!

Answer

since high temperatures are present,the oil used must be a non volatile and it must have good expanding property.the oil is pure.it is replaced after some years.

Question { 4670 }

What is the difference
between Earth and
Neutral?

Answer

Earth is nothing but ground,which is a combination of both +ve & -ve paricles(particles may be ions or electrons),whose potential appears to be zero.whereas neutral in the circuit provides a return part,and if there is any problem of high voltages in the circuit the neutral is connected to the ground.