In 110V DC supply,if a closed circuit gets open, How can we
identify the voltage which is measured after the
resistor(4KOhm) which is open with negative.it shows 55V +ve
when measured, also the actual positive source is 55V +ve
.Because there is no voltage drop in open circuit. How can
we identify whether this is the voltage which is series with
the resistor or the DC source direct +ve.
How one can say about a device (e.g: a light holder contains 20 or 30 L.E.Ds which glows when power supply is off, from which source they are getting the supply..... battery or capacitor) without removing and opening up its case ?
what is the difference between single ratio, multiple core and multiple ratio, multiple core ? please explain.
how much load should be given on 5 mva transformer
7 Answers NTPC, OHPC, Power Grid,
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How to calculate Ith (I thermal) for curent transformer
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What are your personal skills and abilities for such a Master Course and your possible preparation to undertake this course?
why we are caling 440 volt 3 phase supply instead of 660 volt 3 phase supply? because each phase as a voltage of 220 volt. if anybody know the answer for my question please send it to my mail id. thank you.
3 Answers College School Exams Tests, Jindal Steel and Power, JIOL, NEC,
how can we determine size of a cable by knowing the kw or current rating of a load?how can we calculate the resistance box of a slip ring motor?
Importance of fault current in power transformers and how to monitor the same? How is it different from winding temperature?
if the transformer at full load have a iron loss =900w and copper loss = 1600w . what percent of the load will the transformer has a maximum efficiency?