1.In two wattmeter method if one wattmeter shows Negative
reading then wat is reason?
2.Wat is the reason for low voltage in houses?
3.Wat is meant by current and voltage? wat is difference
between the two?
- 10 Answers
- 62001 Views
- Engineering, I also Faced
- E-Mail Answers
Answer Posted / nitin banegaon
its sooo simlpe. when induction motor is on load then the no load current will have two components one is active/load component and other magnetizing component. Magnetizing component is for creating magnetic field to spin the motor which is independent of load current and it lags behind the voltage by 90. Initially on load, current is so small which is normally is in phase with applied voltage. So on no load circuit is inductive. So power factor is small nearly 0.2 to 0.4.
| Is This Answer Correct ? | 8 Yes | 1 No |
Post New Answer View All Answers
Please explain the following and how these are working with PLC unit 1.I/O Module 2.I/O Device 3.Adaptor Card 4.Ribbon Adaptor 5.RS 485-FC
how to calculate insulation level of transformer?
how oti and wti connections are different from each other?
Is it true online ups having bypass mode if it is true then why we called ups because it is interrupting power when goes in bypass mode
how can i determine the KVA/MVA rating of transformer precisely?? is there any standard test?????
what is mean by NPS (Negative phase sequence)fault? what is the difference between EFR & OCR faults?
Why did lightening arrestor solid copper rod head is sharp on mobile tower top?
Why LED light has advantage of rapid reflection ,although other lights alse reflect.? and this light is considered to be best for transmission usage in case of Free optics
PLZ EXPLAIN CORONA,SKIN,BIRD PALE,SPAN,SAG Effects of power cable.
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
Why mostly the HV side of transformer has Delta?
can a 150 kva 3 phase 440v/230V delta-wye step down transformer can be use as step up transfoermer with connected loads at 440v side?
sir please send me techinical questions for junior engineer posting in bangalore railway i am diploma holder
What are the site acceptance tests for power cables, DG Sets, LT panels & 30kVA UPS ?
What do you mean by passive circuit elements and why these are called passive?
