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 2318How 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 8407although 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 ?
1508which 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 68583what are fluorescent lamps (fluorescent fixtures) & what are incandescen lamps (incandescents fixtures) ? differences between these two ?
1 2043how 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 3298if 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 13172what are the differences between 'exhaust fan', 'heavy-duty exhaust fan' & 'super heavy duty exhaust fan'. what are their power ratings ?
CG,
1553whats the one main difference between UPS & inverter ? And electrical engineering & electronics engineering ?
16 20577generally 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 12955Post New Electrical Engineering Questions
what is differentila pilot supervision in the incomer control panel in the power station?
how to calculation increase capacitor,increase power factor for three phase.
State ohm’s law?
how to calculate the settings for shaft ct protn in hydro generators
How to find ampere on ht side for selection of cable size ???
What is stepper motor?
i have completed deee and i've (June2012-feb 2015 experience in electrical maintenance in pvt ltd company.company having HT & LT electrical power.how to apply electrical C-license ,NOW I was resigned my job,what are requirements of applying for c-license
DG cranking voltage?
what is the efficiency of thyristor
State The Difference Between Generator And Alternator?
WHat is the requirement of installing FAST ACTING EARTH SWITCH in GIS and how is that integrated with protection system. How and when does it operate?
What are test signals and their significance?
what is frequency response?
condition Autotrip facia come on control panel of electrical transmission line?
during installation time of transformer and alternator which points we have to observed?
