Transfer of electric power from primary to secondary in a transformer takes place A electrically B magnetically C electro-magnetically D conductively
2 6720Resistance of low voltage side of transformer compared to high voltage side is A less B equal C more D depens on design
1 4833As load in a transformer increases, mutual flux linkage in core= A increases B decreases C not change D first increase then decrease
2 7148Are we do it in single transformer with dual primary as 11 KV and 33 KV and constant output as 415 Volts?.
1 2538In 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 342377 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 1967In 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
1568In 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
1740In 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 1979Stator 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
1666Stator 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 3687A 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
1574Post New Electrical Engineering Questions
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Safety of dry type transformer
for what voltage will reactive power be largest in 380 kv line : a) 375kv b)380kv c)385kv
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how can we design robots
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what is meant by poly phase induction motor ? how its operating by single phase or three phase?
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what is dc mator?types of dc motor?losses in dc motor?what is the mechanical,electrical and commercial efficiency of a dc motor?
why different series of vfds (like allenbradley)are used in industry ?
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