Answer Posted / raja

Assume we give square wave of 50 hz supply to txmr .
from 0 to postive maximum and then it will remain in maximum
value and same for negative axis also . since the rate of
rise from 0 to max + value / _value occurs at one instant of
time and not gradual . there will be no emf at secondary
terminals .

E = 4.44f*flux*turns*sinwt ( w =2pi* freq)- instantaneous
value of secondary emf .

why the frequency and voltage in india is 230v and 50HZ. when compared to USA say 110v and 60 HZ.

1447

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What are the advantages of thermal power plant?

1179

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specify the inbuilt protections in DG

2065

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Please tell me in DETAIL about the following 3 types of fuses or recommend me a good power system protection book or a website link ? 1.Dropout Fuse 2.Striker Fuse 3.Empulsive fuse (not sure if its impulsive or explosion fuse , sorry)

2106

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There is any especial requirement for motor to drive through with VFD?

2605

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What is making & breaking current ???

1515

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How to calculate KVA/VA rating of PT or CT from primary & secondary voltage or primary & secondary current?

2427

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How to synchronization will be done between two DGs ?

1773

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while starting a liquid starter ,is there any volage drop on water/soda on tank.can we touch the tank on starting?

1918

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What is difference between YNyn0 and YNyn ??

2559

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What will happen if the voltage in my house drops from 220V to any lower voltage?

2201

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What is the effect of positive feedback on the stability of the systems?

1087

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What is inverse definite minimum time lag relay? Where is it use?

2822

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If you have an earth with pilecap then your resistance is really low. why and how?

2003

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i need previous entrence exam papers of nhpc.

2845

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