Answer Posted / sunil.dutta

all answers are wrong. Please understand question carefully.

Humming noise in tr. lines is due to charging and
discharging of lines under very high voltage.

what is buffer resistance starter.?.What is the working principle and where it is used..?

1987

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In a tap changing transformer where is the tap connected, is it connected in the primary side or secondary side?

1075

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i have 500 amp inductive load of motors ,,,pleas tell me how can i calculate for capacitor bank for improving my power factor to 99 .....calcullations for capacitor bank,,,,

1557

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why the value of k is more in shell typr transformers?

1943

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Why does curving the pole faces in a dc machine contributes to a smoother dc output voltage from it?

1191

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Why is negative feedback invariably preferred in closed loop system?

2242

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How to resolve if Diesel generator stop while running ?

3043

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What is pd controller?

1046

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I am inpecting a 10kVA UPS what tests should i do and should i observe?

2161

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In constant power region of 3-phase IM torque-speed characteristics, if frequency increases flux A does not alter B decreases C increases D none of above

2182

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if the armature current in a dc generator is ac ( sinusoidal ) why doesnt the sjhape af armature mmf a sinusoidal (ni) ? armature mmf in case of a dc machine is triangular.

1930

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What is dc current source? Differentiate between ideal and non ideal current sources?

1376

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What is a DC series motor?

1191

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which type of stability limit is higher,steady state or transient? why?

1840

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sir iam from electrical and electronics branch ,can i appear for the hpcl offline requirtment? if yes please mail me on vikram_raju25@yahoo.co.in

1979

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