in dc machine airgap is there b\w stator and armature but
by conduction emf is generated how & what is conduction
1. What is differential relay? How it operates? 2.How to calculate the Short Circuit Impedance in Transformer? 3.What is the alternate solution for testing of polarity by using polarity tester while its milli ammeter does not works? 4. While testing the 33KV Busbar by using Hipot kit, what should be the test voltage we have to apply? 5. What is the procedure/activities to be taken to inject the current more than 2000A by using 2000A Loading Transformer? 6. Explain how you can give the overload setting to any Motor Protection Relay for a HT motors with formula and example? 7. Why restricted earth fault protection is needed? Why can’t differential Protection is sufficient? 8. What should be the minimum and maximum ohmic value for earthing? 9. Why DC Currents are not used in transformer? 10. What is the Frequency while we step up the voltage from 220V to 11KV? Is it possible? Explain it?
The transmission does not have options: a)Partition noise b) Flicker noise c) resistance d) Short noise and reason
what is frequency transformer?
why do we use bundle conductors instead of using single conductor of larger size for high voltage transmission?
what is the interrelation between voltage current torgue speed and magnetic flux in case of different types of electric motors
how many types of motor can be used in washing machine
what is the effect of power factor to (a) voltage (b) transformers (c) generators (d)transmission lines
what is the principle of operation of synchronous motor and generator? explain in detail.
what is efficient load of transformer in percentage
I AM FROM ELECTRICAL ENGINEERING ? I AM ASPIRING FOR "BHEL".HOW I HAVE TO PREPARE .ON WHICH TOPICS TO BE CONCENTRATE MORE.PLEASE GIVE FULL DETAILS OF WRITTEN EXAM.
A 200W,230V lamp is connected across 115V supply.The lamp will draw power?
solar cell voltage?
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