Answer Posted / ramesh
Ohms law are only applicable for linear devices where temp
is constant so value of Resistance value remains constant
but for semi conductor device such as varistor like NTC, PTC
which have a certain properties like PTC temp increases =
Resistance increases & for NTC temp increase = resistance
decreases
| Is This Answer Correct ? | 7 Yes | 0 No |
Post New Answer View All Answers
What is the basic principal, by which DC voltage level is increased more than the supplied AC voltage during conversion. As upto AC level it is contorrled by firing anlge but after maximum level how is it possible.Please clear picture. OR we have to supply the higher level AC?
How we calculate the current carrying capacity of H.T. cabel?
Why is a plain induction motor unsuitable for wide speed control?
all details of DG UPS HVAC
Why do we require transformer with less specific weight if supply frequency is increased?
Sir, I have applied for the of Jr.engineer(Electrical & Electronics) & ASST. LOCO PILOT at ALL RRB BOARDS. please send me all RRB Boards solved papers in the year of 2001 tO till date. i requested send me the papers to my id as soon as possible (jet_0991@yahoo.com). (This is very urgent) Thank You,
Explain mechanical rotational system?
low frequency protection why recomend?
1.What will be stored in online ups EPROM IC?
If mutual flux is 1.2wb & power factor is 0.8 lag , then what is the Useful flux of a transformer?
I have one ct of ratio 3000-2000/1 Amp its knee point voltage mentioned on name plate is 500-333/30mA-50mA at Vk/2. in secondary box there is three terminal named 1S1, 1S2, 1S3 then on which terminal obtained the knee point voltage ie 1S1-1S2 OR 1S1-1S3 & also specify the knee point voltage for the ratio 3000 from name plate.
Transmission voltage is kept 11KV,33KV,66KV,132KV,220KV due to form factor. What happen to 400KV and 765KV transmission voltage?
In control room of our one plant there is a continuously the incoming power goes to PC is vary,means in stabilizer it continuously indicate from high input to low and low input to high. what is the reason and its solution.
how net resistance islow in star connection and viseversa in delta connection...? if anybody could explain in detail it wud be helpful.
surge tank, hrc fuse, earthing transformer, firm power objective type