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
- 6448 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
how to select the isolation tranformer for siemens 802dsl cnotroller
Let me know that how i calculate the alternator sub tranciant reactance and tranciant reactance.
The Q-facr o of a coil given as wL/R. what will be shape of Q versus frequency graph.
what is the excess air in furnace
I HAVE BEEN SELECTED FOR APGENCO A.E(ELECTRICAL) 2008.HOW MUCH WEIGHTAGE FOR INTERVIEW AND WRITTEN TEST.HOW I HAVE TO PREPARE. PLEASE GIVE INFORMATION IF U KNOW.WHAT ABT G.D THIS TIME.CALL RATIO 1:2
plz tell me,ht and lt panel terminals in substations explain beiefly
When we use 3 terminal resistor?
What is electrical cable termination
How many double suspension hardware fittings are required on a double circuit transmission tower?
Why increase in current leads to increase in conductor temperature?
plz send me the placement interview question and answers of whizchip(technical and apttitude)..i have an interview in next.
i am going to give the JSEB,RANCHI exam for power plant,so i need some samples of papers related to that,so please send me these papers by my mail id.
When we use air circuit breaker, it has O/L protection ,time delay SC protection, Instataneous SC protection & ground fault protection. They all have some setting range. But what is the suitable/allowable setting for the above protection which will be safe for the equipment? For example-O/L protection setting have a range of (0.4,0.45,0.5,0.55,0.6,0.65,0.7,0.8,0.9,1.0)xIn Time delay SC protection have a range of (1.25,1.5,2,3,4,6,8,10,12)xIn Time delay setting is 0.02,0.1,0.2,0.3,0.4 Instataneous setting is fixed to 20xIn Gound fault setting is given 100A,300A,600A,900A,1200A This setting are for 2500A ACB. So what will be the basic allowable setting for the above protection? is there any formulae to calculate this<
Why does the rotor rotate?
Hello seniors m an engineering student in 3rd yr..i want to know what are the software course in electrical field?i wanted to do certification course but i dont know much about the course?..Regards
