Answer Posted / ravindra
pf tells that how much amount of power delivered by the
source from their total power. in ac ckts it is Cos(q)=p/vi,
ac ckts have v and i both sinosoidal fuction so it comp up
cos q but in electronic ckts cos q never used . so pf=
delevered power/total power , formula used for electronic ckts
| Is This Answer Correct ? | 2 Yes | 1 No |
Post New Answer View All Answers
diff. between tension mode & speed mode
What is the working principle of servo motor? And explain it.
hai friends i have BSNL JTO exam on next month so if any body have model question paper or give preparation tips to my mail id kumar4486@yahoo.co.in this will helpfull for my future .plz & thank u by kumar
I meggared my 2c*70 sq mm AL AR XLPE cable. its one end show 50 M ohm . is my cable is safe for laying. I have only one phase and neutral.
power transmission pole used one support , that only for support or earthing
If the line voltage is reduced to 75% of its rated value then by what percentage current will reduce ?? 75% 25% 50% no change and why ?
What is the most important precaution in any experiment with d.c. Shunt motor?
EXPLAIN THE TRANSFORMER MAINTENANCE?
What is Scheme Test of High Voltage Switchgear. Which tests it includes.
Meter p.t. ratio= 3×230/400 , c.t.ratio = 3×1 (2) A what is m.f.
we have consol make 3 phase servo stabilizer for cnc m/c. while installing the earth neutral voltage is 1.7 volts at stbilizer off condition and when stabilizer get on en voltage reaches 4.8 volts (new earthing is done and neutral is helthy condition all phase to neutral volts 440,442,441 v)why this happen.solution for cause.
Why using synchronising methed in DG's sets?
HOW TO CALCULATE CAPACITOR BANK OR HARMONIC FILTER CALCULATION
Starting times for soft starter & power factor is thier any standard or datas available in manufactures list. Kindly suggest.
Q) Write VBscript code along with QTPscript code in QTP tool for below scenario 1. Launch yahoo site(i know) 2. Do loogin(i know) 3.Click inbox link(i know) 4.Go to every page of mail box and count no.of read mails and no.of unread mails(i know) 5.Store page numbers, read mail count and unread mail count in a new excel file sheet 6.Create 10 types of graphs on that data 7.Do logout and close site(i know) 8.Save new excel files with graph