Question { Shreem Electric Ltd, 23547 }

What is mean by power factor?

Answer

1. It is the ratio of real power(active) and apperent power.
p.f = kw/kva
2. It is the cosine angle bet voltage and current.
It is denoted by the angle of cos.
3. It is the ratio of useful power to total power in the circuit.
4. In the resistive circuit power factor will be one bcs of no any reactive power here(ideally).

Question { HAL, 7175 }

tell me exact relation b/n voltage and current and which one
is depend other

Answer

1. I inversely proportional to voltage at constant power in circuit.
P=VI
2. according to ohm's law current is directly proportional to voltage at constant resistance of conductor.
Ans of 2nd part-
flow of electrons(current) depends upon the applied electromagnetic force(emf or voltage).

Question { IES, 4365 }

Which one of the following Union Ministries launched the
Eco-Mark scheme for labeling the consumer products?
(1) Ministry of Agro and Rural Industries
(2) Ministry of Environment and Forests
(3) Ministry of Food Processing Industries
(4) Ministry of Consumer Affairs, Food and Public Distribution.

Answer

option 4

Question { 3506 }

what is the effect of leading power factor on Power
transformers in existing in major power utility

Answer

1. voltage lead to the current and our electrical equipment not work properly.
2. Revolving m/c has revolving antidirection.

Question { 3773 }

what is the name of transformer

Answer

Transformer name always in KVA rating .
It has constant value of power internally. Don't change of its power at any working condition.