Answer Posted / manik chatterjee

KW=V*I*COS$ THAT IS INCASE OF AC.
KW=V*I THAT IS IN CASE OF DC.

2. Modify your design in question 1.a so that the circuit works according to the following function table X Y F 0 0 Clear 0 1 No Change 1 0 Parallel Loading 1 1 Count 3. Design a circuit that detects the pattern 010 in a serial input X considering: 3.a Overlapping 3.b No overlapping

1886

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I have a relay contact rated at 220v dc which is supplied with a 24vdc from the panel,for it to trip the dampers(24vdc).What if the application of the relay changes so that it should work at its rated 220vdc then will it work at 24vdc supply given or any other consideration needs to be taken .....

2017

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ii) A shunt motor supplied at 230V, runs at 900 rpm when the current is 30A. The resistance of the armature is 0.4 ohms. Calculate the resistance required in series with the armature to reduce the speed to 600 rpm, assuming that the armature current is then 20A. [12]

2285

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how can we select the type of wire.what factors we have to look on it , do we have some formula to calculate it. please guide me on it

1899

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what types of cable used in underground coal mining?

1431

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Circuit diagram of tube light without starter using electrical choke

4061

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How many wall/floor flange will i use in bus duct system if we have in our design a 35th floor building.

1443

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Pl. brief about break-down maintenance of machine tool.

1747

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If a rotary UPS is in line through grid power; What would be the impact on Power Factor if the load through rotary ups is 25% , 50% , 75% & 100%. Will the power factor reduce with less load?

1834

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what is the use of commutator in dc motor if we supply ac ? commutator is used to convert ac to dc.and it is used to arrange the flux in unidirectional in case of dc supply. if we give ac as supply to dc motor what is the use of commutator?

2036

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Which power will flow first if we switch on a motor Active or Reactive? How?

5433

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Name two types of electrical analogous for mechanical system.

1156

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what is mean by parallel operation of permanent magnet generators

1938

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3 shows a 415 V, 3-phase generator supplying a 3-phase 415/110 V transformer. Draw the individual and combined impedance diagrams to a base of 10 kVA. Determine the system fault kVA and the fault currents at the 415 V and 110 V busbars for short circuit faults on the transformer input or output terminals. Work in p.u. values of impedances.

2614

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Is there any reason that we get shock on touching phase wire because the earth is at neutral potential? Is there any reason that the earth is at neutral potential because the neutral is earthed in apower station

1943

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