Answer / maroof khan

semiconductor is a conductor which conductivity lies
between conductor & insulator.
insulator does not allow the flow of current.

Answer / ramkumar

semiconductor conduct current only a.c positive half cycle
but insulator not allow to carry the current with in the
insulating level of that insulator.

Answer / palpandi.a

Semiconductor has 4 electrons in conduction band.due to the
doping it get or lose one electron.so it act as partial
condutor.But insulator has 8 electrons in conduction band.

Answer / sunil guru

There is difference in the doping of SEMICONDUCTOR AND
INSULATOR...
IN SEMICONDUCTOR the distance between the upper band and the
lower band is low...so the conduction level is high...

and in INSULATOR the distance betwn U.B AND L.B is HIGH.. so
the conduction level is low..

insulators sre ban conductors and semiconductors are good
conductors

Answer / phanendra babu

hai maroof,

the first statement of u is wrong because semiconductor
never becomes a conductor.

what do you mean by PF correction. A motor is rated at 15 kw,415 volts, 0.7 pf and eff of 0.92. The powerfactor is improved to 0.98 by adding capacitors at the bus. calculate the current drawn by motor under full load condition before and after pf correction

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