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
What is the mechanism of WTI
why the voltage and current in a long transmission line are called travelling wave?
what is a pilot wiring and whys that called a pilot wiers
can a 150 kva 3 phase 440v/230V delta-wye step down transformer can be use as step up transfoermer with connected loads at 440v side?
Star Delta Diagram with full description
how mass curve differs from hydrograph.
how to work droop ct in generating station
What is s-domain and its significance?
how is the connection of a 3 phase ct trivector meter done on a pole mounted transformer
54 Comments Alok and Bhanu play the following min-max game. Given the expression N = 38 + X*(Y – Z) where X, Y and Z are variables representing single digits (0 to 9), Alok would like to maximize N while Bhanu would like to minimize it. Towards this end, Alok chooses a single digit number and Bhanu substitutes this for a variable of her choice (X, Y or Z). Alok then chooses the next value and Bhanu, the variable to substitute the value. Finally Alok proposes the value for the remaining variable. Assuming both play to their optimal strategies, the value of N at the end of the game would be?
how the B-H loop obtain under the static condition
why actual valve timing diagram is different than ideal valve timing digram of a 4 stroke engine?
Why hydropower is called renewable source of energy?
What happens when ac supply is given as excitation voltage instead of dc supply
What are the functions of temperature scanner in power transformer?
