Answer Posted / sanjay dalvi
power factor of DC system is allways 1,why??
in DC POWER SUPPLY a power supply is constant in nature,
p=v*i angle between voltage & current is zero that is
current is in phase with voltage, cos$=0
for dc supply $ =0
& we know that cos 0 =1
so we can proove that cos $ =1 hence
p= V I COS$
P= V I KW
| Is This Answer Correct ? | 83 Yes | 5 No |
Post New Answer View All Answers
How 48-relay (incomplete sequence) functions?
what is the id1 & id2 setting in differential protection relay of CSPC?
I had applied for JE in PSEB, Can you pls send me the Question bank for related to my field
neutral earth resistance testing is it possible for transformer while in load condition
how did i get the competency certificate as electricle supervisor. iam completed my b.tech.but i dnt have any experince, this certificate is required for applyng ongc mangement trainees. what should i do sir please suggested me
In a tap changing transformer where is the tap connected, is it connected in the primary side or secondary side?
How to know vacuum in vacuum cylinder of breaker in working condition
how current is reverse from its normal direction during the fault?
can u describe the method used for protection of transmission line.
if negative of DC supply used and positive is grounded through EGB, and if ELCB used in the system then is it sense the positive volatge and get tripped is it possible?
DEAR SIR/MADAM,CLEARLY EXPLAIN ABOUT CRAWLING AND COGGING EFFECTS IN INDUCTION MOTOR.
use of choke in APFC panels
how to identify vector group of three phase transformer by voltage method?
What are the advantage of free wheeling diode in a full wave rectifier?
I have c license but I don't know eligibility of Max Kilo Volts under the electrical licensing board.
