Question { 9675 }

What is the difference between Neutral and Eatrh?

Answer

neutral is only zero volt.
earth is zero volt as well as used to earth short circuit
current.

Question { 5307 }

As per IS why should the control be taken only from R
phase, why not from B or Y phase??!!

Answer

the control should be taken from the R-Phase because for R-
Phase the Phase is zero with the current.
and for the y and B phase the phase diff reach to 120 and
240.

Question { L&T, 19584 }

who invented electricity?

Answer

Electricity is a poer that can be inverted in any form.
main thing is that you want to invert that in witch form.
for the phisical output you can change that one through
transducer.
like pizo electric transducer.

to invert electricity we an use a rectifier.

Question { Manhattan, 13302 }

Do you know how to measure the earth resistance?

Answer

to mesure the earth resistance we need to find a specipic
constant of the earth soul.
so by using a formula.

R=P(L/A) Ohm
where,
p = Secific gravity constant
L = lenth of Earth
A = Area of Earth.