Interested to Buy Any Domain ? << Click Here >> for more details...
in case dc we mark as + ve & -ve..but in case a.c. we mark as
ph&N...Y LIKE PLZ TELL ME
- 4 Answers
- 7772 Views
- NPTC, TCS, I also Faced
- E-Mail Answers
Answer Posted / doss
actually there is both positive and negative voltage occurs in the phase(phase line) with respect to the neutral line. this speed of positive and negative voltage variation is purely depends on the frequency of the ac supply. that is during positive half cycle of ac supply the phase line is positive with respect to the netral line. and during the negative half cycle of ac supply the phase line is having a negative voltage with respect to the neutral line(i.e. neutral is positive voltage with respect to the phase line during negative half cycle of ac supply). so we cannot define positive and negative terminal in case of ac supply since the same terminal can act as positive in one half cycle and during other half cycle the same terminal act as negative. so we simply say it as phase and neutral.
| Is This Answer Correct ? | 16 Yes | 1 No |
Post New Answer View All Answers
please tell me when we start motor without load in star or delta connection whose current above condition,pl write formula
what is the difference between vector scale and vector diagram?
What is systematic error?
I have a drawing of a wound rotor induction motor for a crane. This crane motor has 5 forward speeds & 5 reverse speed implemented of course with different amount of resistance for each speed setting selected. What has got me scratching around is the fact that 8 of the 10 speed selections switch in uneven (unbalanced) amounts of resistances on each of the 3 connections to the motor's rotor.Can this be possible? I would have assumed this would produce unbalanced rotor currents and therefore vibration in the motor. I would greatly appreciate anyone's comments on this. Many thanks, Confused.
WHICH SIZE A.B.CABLE IS USED FOR 11KV.
What are the types of the glands and difference between single and double compression type of cable Glands.
Difference between low impedance and high impedance Restricted Earth Fault
What is the effect of solar radiation on the design of an Isolated Phase Busduct?
Define relative stability.
why should the primary of transformer be connected in delta in a heat run test?
What is open delta Xformer? It's adavntages & Use?
in control panel, how can i measuring the distance between one bus bar to another bus bar. then now only for bus bar. in mpcb and contactor also. that means one mpcb to another mpcb how much distance? how can i calculate that.
Explain Active power,reactive power,how its related to each other , & inductive ,capacitive.
advantages and disadvantages of inverse definite minimum time RELAY
What is the exact formula for one weber of magnetic flux?
