How should i design a 1ph & 3 ph transformer. Kindly let meknow all steps and formulaes related to design from scratch.

1609

how to decide choke rating for drive?

1866

I have 2 KW electric water heater.I am gonna use it in controlling water temp.so I needed to increase or decrease the heating capacity.is there any electrical-electronic circuit for varying the resistance & so current?

2567

iam preparing for rrb section engineer post in electrical branch.suggest the right textbook for my reference.fromwhere i will get the previous q.papers?

1721

how to select diiferent power transformers of same capacity on no load loss and full load loss by economical point of view.?

1503

If the Brush of DC motor is shifted by 90 deg, then what happens to voltage and torque? Both voltage and torque are zero. how to justify the answer?

925

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

1558

What is meant by earthhing of a magnetic flow meter and when to use empty pipe detection?

1689

Why need 3phase machine double earthing?

1320

What are safety device in vcb and acb?

3263

What is a difference between indoor transformer and outdoor transformer of same rating

5195

What is the difference between diode and a transistor in terms of the direction of current flow?

1676

can we start slipring motor on star delta like we start induction motor ? if yes where will we connect ?

1486

WHAT IS DEAD END IN PROTECTION?

2003

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]

1846