Answer / n.hemavathy

If in a circuit, current lags behind the voltage then the
resulting power factor is said to be lagging. Ex: Inductive
loads.

If in a circuit, current leads the voltage then the
resulting power factor is said to be leading.
Ex: capacitive loads.

Power factor is the ratio of real power to reactive power.

Answer / sudheer

power factor is the ratio of true power and apparent power.
when the load is inductive, the inductance tends to oppose
the flow of current, storing energy then realising it later
in the cycle. the current wave forms lags behind the
voltage wave form.
when the load is capacitive, the opposite occurs, and the
current wave form leads the voltage waveform.

Answer / er. ankush miglani 9718151073

P.F.=COS#= TRUE POWER\APPARENT POWER
FOR INDUCTIVE LOAD INDUCTOR IS USED WHICH OPPOSES THE
CHANGE IN CURRENT IN THE CIRCUIT AND STORES THE ENERGY IN
THE FORM OF CURRENT AND LEAVES IT LATER. HENCE THE CURRENT
CURRENT WAVEFORM LAGS THE VOLTAGE WAVEFORM, AND THE POWER
FACTOR IS CALLED LAGGING./
FOR CAPACITIVE LOAD CAPACITOR IS USED WHICH OPPOSES THE
CHANGE IN VOLTAGE AND STORES THE ENERGY IN THE FORM OF
VOLTAGE AND LEAVES IT LATER. HENCE THE VOLTAGE WAVEFORM
LAGS THE CURRENT WAVEFORM, AND THE POWER FACTOR IS CALLED
LAGGING BUT THE CURRENT LEADS THE VOLTAGE AND HENCE THE
P.F. IS CALLED LEADING P.F.

Answer / siddarth.m

If in a circuit, current lags behind the voltage then the
resulting power factor is said to be lagging. Ex: Inductive
loads.

If in a circuit, current leads the voltage then the
resulting power factor is said to be leading.
Ex: capacitive loads.

Power factor is the ratio of real power to reactive power







P.F.=COS#= TRUE POWER\APPARENT POWER
FOR INDUCTIVE LOAD INDUCTOR IS USED WHICH OPPOSES THE
CHANGE IN CURRENT IN THE CIRCUIT AND STORES THE ENERGY IN
THE FORM OF CURRENT AND LEAVES IT LATER. HENCE THE CURRENT
CURRENT WAVEFORM LAGS THE VOLTAGE WAVEFORM, AND THE POWER
FACTOR IS CALLED LAGGING./
FOR CAPACITIVE LOAD CAPACITOR IS USED WHICH OPPOSES THE
CHANGE IN VOLTAGE AND STORES THE ENERGY IN THE FORM OF
VOLTAGE AND LEAVES IT LATER. HENCE THE VOLTAGE WAVEFORM
LAGS THE CURRENT WAVEFORM, AND THE POWER FACTOR IS CALLED
LAGGING BUT THE CURRENT LEADS THE VOLTAGE AND HENCE THE
P.F. IS CALLED LEADING P.F.


power factor is the ratio of true power and apparent power.
when the load is inductive, the inductance tends to oppose
the flow of current, storing energy then realising it later
in the cycle. the current wave forms lags behind the
voltage wave form.
when the load is capacitive, the opposite occurs, and the
current wave form leads the voltage waveform.

Answer / rahul

well this concept of lag or lead has meaning only when both
VOLT and CURRENT waves are SINUSOIDAL...
For sinusoidal V and I, usually we consider V as reference
phasor and LEAD indicates I leads V(eg. for capacitive
loads) while LAG indicates I lags V(eg. for inductive
loads).
Basically concept of LEAD is rather ambiguous. coz for
capacitive ckt actually "V lags I" rather than "I leads V".

Answer / r. p. sirohi

If in a electrical Circuit, the current lead the voltage , then it called leading power factor ex- Capacitors load.
If in a electrical circuit the cuurent leg the volatage , then it called lagging power factor ex- Inductive load.

Answer / lokesh kumar

power factor is nothing but it is the ratio of average power to the (RMS current *RMS voltage)...in general it is the cosine angle between voltage and and current...

Answer / anbumani r

If in a circuit, current lags behind the voltage by 90 degree then the resulting power factor is said to be lagging. Ex: Inductive loads.

If in a circuit, current leads the voltage by 90 degree then the resulting power factor is said to be leading.
Ex: capacitive loads.

Power factor is the ratio of real power to reactive power

Answer / vinod pandita

power factor= cos = w/va vinod pandita

Answer / simon

Pf is of 3 types i.e
1.Leading (Xc>Xl)
2. Lagging(Xc,Xl)
3.Unity (Xc=Xl)

1.In A.C Circuit if cap Reactance's has more current in comparison of inductive reactance's then Voltage will lead.
2.In A.C Circuit if cap Reactance's has less current in comparison of inductive reactance's then Voltage will lag.
3.In A.C Circuit if both r equal then it will b unity.

What is OT in a transformer, specify its function.

2 Answers  

Which Motor used in Fan's Motor ?

3 Answers   Matsui Technologies,

What should be ideal IR value for 11kV, un earthed, 1 MW motor?

3 Answers   Sail,

How many types of fault occur in a 3-phase power system?

2 Answers  

My switchgear busbar is rated at 2000A and just imagine the actual load on busbar is 1000A. From that busbar there are 10 outgoing feeders. Now the question is will the load be 1000A on each outgoing feeder or 100A per outgoing feeder. 2nd thing how do i calculate the load on individual feeder. Thanks for your time. Please provide some clarification on this issue.

1 Answers   Alstom,

How to determine the short circuit current for breakers and VCB.

1 Answers   Sabic,

Difference B/W A/C & D/C Motors..?

10 Answers   Toyota,

various transmission tower like .,D tower ,K.C.O tower ,C.C.O tower,K.C.R tower ,C.C.R tower ,H.C.O tower in different tons.

0 Answers  

how to calculate the transformer losses.

4 Answers   Cipla,

how many typetesting of transformers?

8 Answers   ONGC,

Please give me a solid reason there are 2 ELCB's If we take Phase from ELCB NO:1 an Netural from ELCB N:2 why ELCB is tripping when we connect the Load?please brief me with detail

3 Answers  

condider as 100 w lamps glowing . for completing a one unit how much time it should glow

3 Answers   Avalon,