Answer / balaji

In squarewave pulse the output contains more ripples.. But
in Pulse width modulation(PWM)the ripples in the output is
very less...

Answer / prava

both magnitude and frequency can be controlled by PWM
technique where as in square wave pulse the magnitude
depends on the input only frequency can be controlled

1)why the transformer rating in KVA insted of KW 2)why the secondary of ct is shorted and why the PT secondary is open

3 Answers  

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If we impress a dc voltage of 230 V on an unloaded 230 V, 50 Hz transformer it wi A give high secondary voltage B burn out C give secondary voltage as per K D none of these

0 Answers  

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1) Why distributiion system decided 11 kv, 33 kv, 66 kv, 132 kv, 220 kv, 400 kv, 2) In 3 Phase line terminal of capacitor, why used for power factor improvement. 3) Why used rating KVA in transformer?

1 Answers  

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Rated moter voltage and frequency is 380volt 60 hz but moter is running at 380votac 50hz is this harmful for moter winding

1 Answers   Infosys,

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What should be the values of settling time, peak time, steady state error, overshoot, rise time, MPOS (Maximum percent over shoot) to keep the system in transient state, to keep the system in steady state ?

0 Answers  

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if a damaged 500kva transformer with %impedance 2.6 is replaced by two transformers of 250Kva with different % impedance will they be able to catter the load. what will be the ratio of load on the two transformers if the % impedance is in the ratio 1:2

2 Answers   Siemens,

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In 3 phase induction motor even with low Voltage it reaches nearly it's rated speed why? (for example instead of 400V it reaches with 250V)

2 Answers  

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WHAT IS SERVO MOTOR

1 Answers   Fluxys, Infosys,

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what is intermediate switch

1 Answers  

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What happen if 200 KVAR capacitor connected to power continuesly?

0 Answers  

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What is power factor why we should maintain the power factor unless what will happen

0 Answers  

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what is power factor?

7 Answers   CA,

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