which of the folowing has negative temperature coefficient
of resistance?

a. mercury
b. copper
c. lead
d. carbon

Answer Posted / samir yadav

carbon

Is This Answer Correct ?    17 Yes 2 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

why does rotor rotets?

2066


How to synchronization will be done between two DGs ?

1315


What the main causes of transient interruptions on Over-Head Distribution Lines?

1589


Discuss about gear cutting machines.

788


does the Trivector Meter of three phase automatically takes care of the low power factor and gives the reading accordigly or it does not take care of the Power factor while giving the readings please explain

1404






Why the power generated in dams is complex power? Why the generators in dams cannot produce Real power directly (i.e power which has zero reactive part)?

1322


Dear Mr B C pal...Can you plz. put some light on principle of operation of Z-Ct in conjunction to its use with 1Cx1000Sqmm HT Cables & Directional Ground Fault / Over Voltage Relays...Regd..Parag v K 9899115632

2249


Can we convert off line transformer to on line transformer

1475


what is the transformer rush current?

1582


List the advantages of star-delta starter with induction motor?

614


What should be the voltage between Neutral and Ground in secondary side of the step down transformer (230 V to 110 V) with no load condition?

1615


What is the diff. between single compression and double compression gland

1524


how can i find cable size from current rating?

1322


what is destructive and non-destructive testing of welding

1213


Stator of 3-phase IM has 3 slots per pole per phase. If supply frequency is 50 Hz, calculate the speed of rotating stator flux A 1000 rpm B 500 rpm C 1500 rpm D 1440 rpm

1680