Question { 21040 }

why we cant use AC supply products in DC supply?

Answer

In Most of AC equipments we have Inductors and as we know if
we ll apply DC across it a very high magnitude of voltage
will appear accros the winding ,as in case of Transformers
if we ll apply dc voltage wingings will get burnt.....

Question { 6546 }

considering the 3phase and single phase ac system the load
applied and the volage given is same...will the current
differs for both the cases are it wil remain same?

Answer

I think current will depend on star-delta of 3phase and due
to that Vph will vary and in accordance current will vary.....

Question { HSBC, 26673 }

what is the difference between indoor & Out door substations

Answer

Substations are where we receive voltage of order 33kV or
less and stations receiving 220kV n all are receiving station,

so indoor substations are for 11/.44 (preffered) for
domestic purpose...and...outdoor substations are 33/11......

Question { Vedanta, 10685 }

can we say current flows inside an atom as electron moves
inside an atom?

Answer

Current is due to valence electrons which are present in the
outermost shell and when they travel in the lattice the move
to valence orbits...but never inside the atom...so current
always flow in lattice but never through atom......

Question { 3516 }

Can we use the ceiling fan regulator to run drill machine having 2000 watt power consumption?

Answer

First of all every induction motor has a fixed Tem, i.e. Maximum Torque and to deliver 2000 watt of power a motor has to produce corresponding torque (Power=Torque* rpm). And N=120*f/P so rpm can be at max 3000 with 2 pole machine. So to develop 2000 watt of power it is the requirement of torque rather than simply the speed.