ELECTRICAL MACHINE

2 Answers   Bhel, HPC, NHPC,

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CONSIDER A 415V/200V STEP DOWN TRANSFORMER.CAN WE USE USE IT AS STEP UP TRANSFORMER BY GIVING 200V IN SECONDARY AND TAKING OUTPUT FROM PRIMARY?

3 Answers  

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what is the working process of over & under voltage relay.

0 Answers   NTPC,

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In 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

0 Answers  

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Is there any Institution (Not AMIE)for giving B-Tech/M-tech in Electrical engineering for those who r in service? Give the details please.

2 Answers  

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why do we use 25kv supply for traction purpose

1 Answers  

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Induction generator has = A negative speed B negative slip C negative voltage D negative current

2 Answers  

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What is differance between Slip ring motor and Squirrel cage Motor ?

2 Answers  

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a 120 60 watt incandescent lamp has to be operated from 50 c/sec 1 phase ac supply. in order to do this a circuit element has to be connect in series with the lamp. which one of the following sries element is preferable.

1 Answers   SSC,

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as we know that N=120f/P speed of an im can be controled only through changing no if poles, can we control by changing the frequncy????

7 Answers   JSW,

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we convert 66kv to 33kv then 33kv to 11kv,11kv to 440v.why not we convert directly from 66kv to440v?

7 Answers   HCL, L&T,

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why the LED of my electrical meter glows even after the line has gone. what actually the reason?

3 Answers  

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