Answer / ashutosh jha

An electric generator or electric motor consists of a rotor spinning in a magnetic field. The magnetic field may be produced by permanent magnets or by field coils. In the case of a machine with field coils, a current must flow in the coils to generate the field, otherwise no power is transferred to or from the rotor.

when a machine act as genartor and as motor?

2 Answers  

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what is thermal setting and magnetical setting?

1 Answers  

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While converting delta into star or star into delta ,the three values of resistances remains unchanged .Find out the value?Let In star R1=x;r2=x;R3=x On converting into delta,R12=x;R23=x;R31=x Find the value of x

0 Answers  

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In scott connected transformer number of turns in the primary winding of teaser transformer is % of number of primary turns of main transformer A 86.6 B 57.7 C 14.4 D 33.3

1 Answers  

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How much dc volt applied in cathodic protection system?

0 Answers  

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Starting current of a 10 HP induction Motor is ______ time’s full load current.

0 Answers  

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We use ungrounded DC system (220V/110V) for control and protection system in substations etc. Suppose we have long 2 core DC cables running from our DCDB in control room to the load (length of around 2 to 3 km). Do we need to protect these long DC cables from earth leakages or not? If yes how?

5 Answers   Siemens,

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why solinoid coil used in tripping rely?and why not other type coil?

1 Answers  

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What is the d/f b/w MCCB & MCB

6 Answers   ABC, LMN,

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area control error

0 Answers  

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How to calculate cable size between battery charger to Battery ?

2 Answers   L&T,

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meter ratio is 100/5 CT ratio is 125/5, when the ratios changes i.e., CT ratio is 125/5 meter ratio is 100/5 what is the MF in boths conditions?

1 Answers  

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