how we can calculate power factor without knowing current in
230v 100w load ?
Answers were Sorted based on User's Feedback
Answer / nandu
this is approximation:
As we know that power factor can,t be grater than 1 and we
also know that our supply voltage variation is -10% to +10%
we can't take +10% because pf<=1
so -10% of 230 is v(10%)=207v
as we already know that pf=p/vi
=> i=p/v(10%) =100/207A
=> pf=100/230(100/207)=207/230=0.9
so power factor is (approximate) = 0.9
Is This Answer Correct ? | 3 Yes | 1 No |
Answer / asheesh
to calculate power factor first we have to calculate
current. for this we can apply rated voltage to load and
then measure the current flowing through load by measuring
instrument and then
power factor = watt/rated voltage*current
Is This Answer Correct ? | 1 Yes | 0 No |
Answer / ajayiet
ha ha he man are u all
insane.load rating is either in
kva or kw.100 w means that
either it is a motor load or
resistance.so pf is unity.
Is This Answer Correct ? | 1 Yes | 0 No |
Answer / remodeen
WITHOUT KNOWING CURRENT .,,, HOW WE CALCULATE PF???
Is This Answer Correct ? | 0 Yes | 0 No |
Answer / amarnath
PF= 0.8 Default
Use the Formula P=V*I*Cos PI
P= Power= 100W
V= Voltage= 230V
I=?
Cos PI= 0.8
Is This Answer Correct ? | 1 Yes | 3 No |
Answer / gnaneshwar
without knowing current we cannot find the powerfactor.As per
question we have voltage v=230 and power p=100w as per
ohm'slaw p=vi,so I=p/v you'll get current then powerfactor=p/vI
Is This Answer Correct ? | 3 Yes | 9 No |
What is the purpose of SOTF being used inspite of distance Protection given?
how to calculate 'In'in a system?
A LT ckt i mean 440 volt flow of current100A.at this time HT current what will ON 11 KV &33 KV.plz givemy answer with example
Why neutral grounding Transformer provided for generator?
what is the roll of power factor in induction motor.
How to findout raw or ups power? its not indicated in socket,
in transformer which grade oil will use?
HOW TO CALCULATE UPS BATTERY BACKUP TIME
how braking & making capacity of circuit breaker are calculated?
7. A resistance of 30 ohm is connected across 240v supply. If a resistance R ohm is connected in parallel with 30ohm resistor across the same supply, the current drawn becomes triple of original one The unknown resistor R is
how to diffrentiate between ac & dc motors from a distance
i have a wire.and the current flowing in that.when we cut the wire then why dont we seen the elactrons....