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Transfer of electric power from primary to secondary in a transformer takes place A electrically B magnetically C electro-magnetically D conductively
2 7802Resistance of low voltage side of transformer compared to high voltage side is A less B equal C more D depens on design
1 5628As load in a transformer increases, mutual flux linkage in core= A increases B decreases C not change D first increase then decrease
2 8263Are we do it in single transformer with dual primary as 11 KV and 33 KV and constant output as 415 Volts?.
1 3138In 3 phase induction motor even with low Voltage it reaches nearly it's rated speed why? (for example instead of 400V it reaches with 250V)
2 463077 In constant power region of 3-phase IM torque-speed characteristics, the torque is proportional to A speed B slip C 1/speed D 1/slip
1 2704In constant power region of 3-phase IM torque-speed characteristics, if frequency increases slip A does not alter B decreases C increases D none of above
2016In constant power region of 3-phase IM torque-speed characteristics, if frequency increases flux A does not alter B decreases C increases D none of above
2197In constant power region of 3-phase IM torque-speed characteristics, if frequency increases voltage A does not alter B decreases C increases D none of above
1 2684Stator of 3-phase IM has 3 slots per pole per phase. If supply frequency is 50 Hz, calculate the speed of rotating stator flux A 1000 rpm B 500 rpm C 1500 rpm D 1440 rpm
2148Stator of 3-phase IM has 3 slots per pole per phase, calculate number of stator pole pairs. A 1 B 6 C 2 D 3
2 4481A 3-phase IM is supplied from 50 Hz system. It runs at speed of 1440 rpm and slip equal to 4 %. Calculate number of pole pairs. A 1 B 6 C 2 D 3
1980Post New Electrical Engineering Questions
what are the differant std sizes of cable trenches?
I have a situation to design sub-Distribution board/Panel meant for feeding power sockets. In the incomer CAN i Take TP MCCB with Neutral Link and All the outgoing feeders with to sockets with TP MCCB and Neutral Link? P.S : My System is IT Earthing
15hp motor wound by 0.9mm & 0.95mm magnet wire. at no load test it draw 4.2A current. Another motor with same condition draw 9.2A current. How can that occur? pls help
We have studied about many techniques for finding the stability of system, ROOT LOCUS, ROUTH, BODE PLOT, POLER PLOT etc. In these which is used where. what are the difference among them... PLZ tell me.......
From what on-site components does the HT panel monitoring the bus-bars in a 11kV system take inputs?
Differentiate between digital phase converter and ordinary phase converter.
HOW TO WORK A VFD?SAY SIMPLE METHOD
how we decide scurt (disc) of insulator with respect to kv rating
What happens if the series current double?
Which capacitor is preferred for high voltage and frequency?
ROC converges if poles and zeros lie inside a. Origion b. Z=1
Earth leakage relay basic knowledge principle
why do we need to use 3c+3e cable, normally i select only 3c+e cable and i think it is enough. pls explain the usefull of 3e cable ( in this project the earthing system is well done)
what is the standard duration after failure EB power
What is accuracy of a measurement?
