Answer Posted / 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

why we use circuit breakers for switching instead of normal switching device?

1822

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Where I can get the sample question for post of Junior engineer electrical-II For RRB Bhubaneswar.

2129

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Usually in the L & T make MCC feeders' power circuit,we have BMR after the MAIN CONTACTOR.,can we interchange their position, keeping the control logic same???

2053

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Dry type transformers

1825

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when qty of cable being purchased is not sufficient according to the standard,what should the inspector do to ensure its quality according to the standard?

2023

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although ckt breakers have taken the place of old fuse. But instead of it , these older ones are still used in the industries and homes ? why .... what are their advantages and disadvantages ? which one is leading and winning the race and competition ?

1937

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if the number of poles generated in stator and rotor side of an induction motor are different then what will happen and why?

1825

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Why space heater is required for each verical bus bar chamber? if one space heater is adequate or not for anti condensation?

2478

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what are the specifications we must look at to select a relay for any capacity motor?

1991

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what is mppt (maximum power point tracking ) and how they used in solar power generation ??? what are the main components used in mppt?????

3255

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in Telecom DC system-why positive +ve is made earthed.and - ve is fed to load.

2627

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How to findout raw or ups power? its not indicated in socket,

1986

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How we can calculate the consumption in kwh of motor on basis of kw @100% load, @50% load & @ no load.

2743

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What is the one main difference between ups & inverter ? And electrical engineering & electronics engineering ?

1089

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What is load boxes ?

2092

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