What is power factor? (Power in AC circuits) | Alternating current | Physics | Khan Academy

The power factor represents the fraction of the available power (also called apparent power) that is consumed (also called the true power) by the circuit. Low power factors cause higher heating losses in transmission lines. Let's explore this in more detail.

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Created by Mahesh Shenoy

[varshavidya]

Wow. I was struggling with some crazy mathematical derivation and this simplified it so much for me. Thank you. 😃

[m..]

I really addicted to physics because of you sir thank u so much 🙇‍♀️👩‍🏫

[lybahtafannum]

The voice and way of interacting are superb💫💫💫💫

[nishok]

we can add inductor or capacitor in parallel to the circuit based on whether current lags voltage or leads voltage respectively, connecting, given that the resistor needs to consume same power . BUT if we just concentrate on increasing the power factor we can either connect in series or parallel, although connecting in parallel will give a exaggerated effect

[nandininandakumar]

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[penumalasunitha]

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[shivang]

wow u r amazing, edit : ah i think to increase the power in ckt, we cant change the lcr or w so need to change the orientation of lcr, if we connect them all in parallel, that means the voltage accros them is same then P = Vrms/R, = Vrms/ZcosPhi, so Phi inc cosphi dec, overall power increases thank you sir you clear my lot of concepts in jee physic love u sir
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[manmohanbisht]

We can change frequency of the current to change power factor..

[kulasekaracoding]

oh my god, your voice and toning (electric company stuff haha) just makes this so much enjoyable. Well done! love all of your videos.

[Study-rqck]

Thanks sir I was really struggling with concept of power factor, I used to think less power factor less the power so less loss so it is better. But now I completely understand the topic and know more is better thanks ❤

[NorahCool-bz]

I adore your energy in this; I 100% giggled during the energy company rant

[eliaseve]

Am 3rd yesr Electrican who went through this and for the first time it's much clear both phasor video n this. Thank you just subscribed.

[Z-eng]

Best explanation of power factor, efficiency, and real power I've ever seen

[preciouschidi]

Thank you very much sir, I've not yet seen a better teacher than you. Thank you for making the concept so easy

[dharanishree]

Could you do videos in electrical engineering?
It will be so useful.

[tanmayking]

We can add the capacitor with other capacitors in series or the inductor with other inductors in parallel .

[dushyantvishal]

If we assume that XL is greater than XC and XC is equal to R.

Connect Inductor and capacitor in series then connect this combination with resistance in parallel then give AC sorce.

So we observe that in normal case current throw the resistance is V/√R^2+(XL-Xc)^2.
and in our assumed case
Resistance branch and Inductor capacitor branch have different current

So we assume that resistance current as I', and I is the current throw capacitor and Inductor.

Applying Ohm's law
V=I'R
V=IZ
I'R=IZ

I'=I(Z/R), Z=√XL-Xc^2

So in this case resistance current is more than inductor and capacitor current
Which was same in normal case.

Tell me if I am wrong

[manmohanbisht]

Thank u sir..
Best teacher in the whole wide world..

[giteshhhhh]

We can make the wires thicker, so R will decrease and hence PF would increase

[anything]

We must resonate the angular frequency to improve the power factor