why does a dc machine has high efficiency while working as a generator than as a motor

1 Answers  

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2. A current i=(10+10 sin t)amperes is passed through MI type ammeter. its reading will be.........

0 Answers   SSC,

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what is the purpose of commutator in DC motor?

3 Answers  

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How Flywheel run in DG set, tell in details

1 Answers   Sambhav, TATA,

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what dose the arrow indicate in the symbol of power transformer?

1 Answers  

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What is the exact load current needed for a place which has 100nos of bulb of each 100w?

2 Answers  

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how many types of grounding?

7 Answers  

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when we r using 3.5 cable for a bldg. and put laod on each phase using the neutral and neutral is the return paht for the phase so the current of the neutral must be Ir+Ib+iY (return).But the size of the netural is .5 as comper to the phase.

2 Answers  

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Where can I get CPWD electrical shedule rates in web? please help me.

1 Answers  

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In transformers Which type of connection is preferred for harmonics to be minimum. primary : secondary star without neutral:open delta star with neutral :open delta star without neutral: delta star with neutral : delta explain why

1 Answers   Genco,

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1) What is difference b/w impedence relay and differential relay? 2) what are substations equipments? 3) what is difference b/w circuit breaker and isolator? 4)what are the types of circuit breakers? 5) which medium is mostlty used in circuit breakers and why it is used?

1 Answers   NTDC,

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What is the difference between earthing,ground&nutral?

2 Answers   Bhel,

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