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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 ?
CMC,
1 3004How one can check the charger of the mobile phone or any other charger .......... that is it working ? if , working is it delivering the required supply which is needed by the battery to charge properly ?
4 10013although ckt breakers have taken the place of old fuse. But instead of it , these older ones are still used in the industries and homes ? why .... what are their advantages and disadvantages ? which one is leading and winning the race and competition ?
1949which type of A.C motor is used in the fan (ceiling fan, exhaust fan, padestal fan, bracket fan etc) which are find in the houses ?
25 74095what are fluorescent lamps (fluorescent fixtures) & what are incandescen lamps (incandescents fixtures) ? differences between these two ?
1 2746how one can know the charging time, discharging time of a 12 VDC battery ? If i have a battery of 12 VDC , 4.0 AH , how long will it take to charge from a charger (power supply) of input 220 V , Output 15 V and output current of 3000 mA and how long will it take to discharge whether using or not ? How much backup will it give ?
ONGC,
1 3944if we want to increase the back up time of an UPS what should we do ? if we want to decrease the charging time of a battery/batteries attached with the UPS what should we do ?
6 14880what are the differences between 'exhaust fan', 'heavy-duty exhaust fan' & 'super heavy duty exhaust fan'. what are their power ratings ?
CG,
2023whats the one main difference between UPS & inverter ? And electrical engineering & electronics engineering ?
16 25255generally on the roadside v hav 11kv line which is being step down to 440v line to line....so any1 can tell me which type of transformer they r using whether it is star to delta,delta to star etc...???
9 15391Post New Electrical Engineering Questions
How much current will a 5 HP delta connected motor at no load will take?Is tat need a starter
CPC cable .PVC \1C....I want to get sure that type is flexible indoor or to be install on trench. please advice .thanx :)
what is the synchronous timer ? and it applications.
how to build a network which step down 415v to 1v rms
what is the difference b/w ground & virtual ground?
how to Select its CORE in electrical cables based on its applications? or Application of various types of electrical cable based on it CORE?
what is the purpose of using filters in a protective relaying scheme?
What is meant by a stray loss of a induction motor??? What is the equation to find it
being an electrical engineer why you wanna come into software i have an very good academics what answer i have to give
how to calulate short circuit current for the following: 1.cable connecting 11KV of 22KV/11KV transformer to 11Kv of 11KV/415V transformer 2.what cable size should i use.
how can we change the phase angle b/w two phase?
how maney type tempereture measurement ?
How to decide and select the different earthing wire size for the different types of earthing
Explain M Var? Which types of problem occurs when reactive power increase at the time of full load of plant and at the time of synchronize of plant?
Explain few advantages of electric traction system?
