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
How can get elongation of 2 k.G aluminium, if elongated aluminium dia is 2.5 mm?
Determine the BTU size of an aircon for 20 sq metre room
in my working site. momentary jerck in electrical supply ocurred frequently which cause of multiple losses in our electrical equipements. how can we protect our electrical machines and equipements in this situation.
What is Fire Panel ? How it works ?
what is the difference between droop mode and ischnorous mode in thermal powerplant?
how much value of resistance should connect to 15 kw, 6 pole 3 phase slip ring induction motor having RV-240, RA-42.
in electrical control panel. how can i choose the cable rating. (example - 11kw motor, 18-25A mpcb}
How I can Compare 120v/60Hz versus 220v/50Hz ? Please tell me both advantage and disadvantage ......
What is the formula for calculating no-load current?
why is using sensor?what is differece between photoelectric and proxmitty?
Is a direct shorth ciruit on a branch MCCB in a Low Voltage Switchboard a correct means of tesing the performance for discrimination?
how we test a 3 phase motor on single phase supply....? HOW WE RUN A 3 PHASE MOTOR ON SNIGLE PHASE. supply for testing..? how we verify of a 3 phase motors 6 wire & name thame a1/a2/a3..b1/b2/b3 and c1/c2/c3 for connecting star delta starter ........i have only 1 phase supply ? help forum..........
State the points to be considered for selecting a particular type wiring.
what is two point starter?
Explain the construction of the conservator, operation and purpose, and draw the diagram of the conservator.