Answer / ehtesham ali khan

The problem in the TRF receiver are solved in this receiver.
it converts RF signals to a lower frequency IF signal.
The radio & Tv receivers works on th principle.

No variations in bandwidth.
high sensitivity and selectivity
high adjacent channel rejection.

how much load 15kva dg set can bear

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how ti maintain the power factor in power generation

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what principle the cabel TV channels are transmitted? will you be able to check the power at the connector behind your TV with a tester?If yes what is the supply level?

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where is the primary of CT??

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In Dyn11 power transformer if any one of the 3 phases connected to earth in star connected side then please explain effect of the current flow in delta connected side of transformer.(In this case if one phase is shorted to ground in star connected side then we observe the current flow in two phases only not three phases in delta connected primary side. Please explain why it is so?)

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Whether the over frequency protection is turbine or alternator and why?

1 Answers   Marg,

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In case of a synchronous generator carbon brushes, some brushes expire before the others. Why is so? When all the brushes are installed at the same time, why don't thee expire at the same time?

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what is interpose vt where it is used and y it is used?

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can we use generator(a.c) as a motor.if so how if not why.

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What must be the minimum distance maintained between 2 Generators as per International standards?

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give me atleast four differences between circuit and network

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what happens when we give ac supply to the dc motor?and why?

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