Alternating Current Class 12 Physics | NCERT Chapter 7 | CBSE NEET JEE | One Shot

Timestamps:
0:00 Introduction
0:57 Alternating current
1:35 AC vs.DC
3:54 AC circuits
4:13 AC voltage applied to resistor
6:40 Graphical representation of Voltage & Current
8:47 Power associated with Resistor
13:21 Introducing rms voltage
15:52 Introducing rms current
17:04 Determining Vrms
22:04 Overview: Irms,Iavg,Iinst
23:33 Phasor diagrams
24:27 Phasors
26:35 Phasor diagram for Resistive circuit
30:33 Inductive AC circuit
37:46 Phasor diagram for Inductive circuit
39:90 Power associated with Inductor
43:41 Capacitive AC circuit
48:54 Power associated with Capacitor
51:29 Phasor diagram for Capacitive circuit
52:38 Series LCR circuit
54:58 Impedance in a LCR circuit
1:05:23 Phasor Diagram
1:06:42 Impedance Diagram
1:08:47 Series LCR circuit
1:11:58 Resonance
1:14:23 Resonance of Series LCR circuit
1:18:56 Resonance:Application
1:20:51 Sharpness of Resonance
1:26:00 Problem 1.
1:27:17 Problem 2.
1:31:42 Power in AC circuit
1:36:24 Power in different AC circuits
1:39:46 LC oscillations
1:45:54 Oscillations in LC circuit
1:49:30 Analogy between Mechanical & Electrical quantities
1:51:12 Are LC oscillations realistic?
1:53:24 Transformer
1:55:47 Transformer:Construction
1:56:26 Transformer:Working
2:02:34 Transformer:Types
2:03:53 Application:Transmission over long distances
2:05:57 Transformer Applications
2:06:41 Energy losses in actual transformers

In this video we will cover:
1.The peak voltage of an ac supply is 300 V. What is the rms voltage?
2.The rms value of current in an ac circuit is 10 A. What is the peak current?
3. A 15.0 μF capacitor is connected to a 220 V, 50 Hz source. Find the capacitive reactance and the current (rms and peak) in the circuit. If the frequency is doubled, what happens to the capacitive reactance and the current?
4.Resistance of windings
5.Flux Leakage
6.Hystersis
7.Eddy currents
8.NCERT Solutions Class 12 Physics Alternating current
9. NCERT Class 12 Physics Alternating Current notes
10.Physics Chapter 7 Class 12 Physics Alternating Current notes

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Roshni Mukherjee, the Founder-Educator at LearnoHub has been building this free learning platform since 2011. She has been recognised as one of the 100 Women Achievers of India by the Ministry of Women & Child Development and felicitated by the President of India in 2016. Roshni has been invited by Google to speak at Global Education Symposium 2017 held at Google Headquarters, California. Limca Book of Records also recognized our work.

#LearnoHubPhysics #SabkoSamajhAayega #FREEhaiParBESThai #CBSEClass12Physics

"

[Abhishek]

IPL= Inductor-potential-leads
CCL= Capacitor-current-leads
Memory tip😄

[Sagar-iwhi]

Timestamps:
0:00 Introduction
0:57 Alternating current
1:35 AC vs.DC
3:54 AC circuits
4:13 AC voltage applied to resistor
6:40 Graphical representation of Voltage & Current
8:47 Power associated with Resistor
13:21 Introducing rms voltage
15:52 Introducing rms current
17:04 Determining Vrms
22:04 Overview: Irms, Iavg, Iinst
23:33 Phasor diagrams
24:27 Phasors
26:35 Phasor diagram for Resistive circuit
30:33 Inductive AC circuit
37:46 Phasor diagram for Inductive circuit
39:90 Power associated with Inductor
43:41 Capacitive AC circuit
48:54 Power associated with Capacitor
51:29 Phasor diagram for Capacitive circuit
52:38 Series LCR circuit
54:58 Impedance in a LCR circuit
1:05:23 Phasor Diagram
1:06:42 Impedance Diagram
1:08:47 Series LCR circuit
1:11:58 Resonance
1:14:23 Resonance of Series LCR circuit
1:18:56 Resonance:Application
1:20:51 Sharpness of Resonance
1:26:00 Problem 1.
1:27:17 Problem 2.
1:31:42 Power in AC circuit
1:36:24 Power in different AC circuits
1:39:46 LC oscillations
1:45:54 Oscillations in LC circuit
1:49:30 Analogy between Mechanical & Electrical quantities
1:51:12 Are LC oscillations realistic?
1:53:24 Transformer
1:55:47 Transformer:Construction
1:56:26 Transformer:Working
2:02:34 Transformer:Types
2:03:53 Application:Transmission over long distances
2:05:57 Transformer Applications
2:06:41 Energy losses in actual transformers

[prttyrain]

good luck to all of us giving our physics board tmrw ! this video is a lifesaver ma'am, thank u for always making concepts easier to understand <3

[musicalguy]

Ma'am you literally saved us, this is the most demanding chapter, and you made this video within a week, thank a lot ma'am. And thanks to all learnohub team who made this possible💐💐

[anamikatiwari]

Tip to remember: ✌✌✌
For Inductor... IPL i.e. Inductor Potential Leads
For Capacitor.... CCL i.e. Capacitor Current Leads
Thanks me later...😇

[agamprakashmishra]

Best of luck everyone for tomorrow's exam👍🏼😀

[mytouniverse]

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[akshayavlogs]

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[shankarsai]

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YOU IMMEDIATELY MADE A VIDEO ON THE CHAPTER WE REQ.
THAT TO WITHIN A WEEK .... THANK YOU SO MUCH MAM

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[arushrastogi]

Phir aa gaye comments padhne 😂

Chapter Padhlo pehle 🙂

[Alok_Karn]

For a purely inductive circuit, using Voltage law
VmSinwt -Ldi/dt = 0
Ldi = VmSinwtdt
integrate both sides
Li = -VmCoswt/w
i = -(Vm/wL)Coswt
i = -(Vm/XL) Coswt
i = -(Vm/XL) Sin(90-Wt)
i = Vm/XLSin(wt-90)
Therefore, current in a purely inductive circuit lags voltage by 90 degrees
Inductive reactance XL = wL = 2(pi)fL
Trigonometric identity used - sin(-A) = -SinA, to adjust -Sin(90-wt) to Sin(wt-90)

[liyana]

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[princephogat]

How many students prepare for CBSE boards 2023 ?

[hermionegranger]

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[aleenabanerjee]

I was soo desperately waiting for this...cause I had completed all my 6 chapters from you and wanted to complete this one also before the exam started...thank you soo much ma'am for uploading it timely...you really teach soo beautifully makes it all soo simple to understand that things which I found difficult earlier, being able to comprehend so effortlessly now. so thank you once again and yeah...CONCEPT HUA CRYSTAL CLEAR!! 😁

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[sakshikim]

Ma'am when i read 1st time the formulas were seeming difficult to be remembered. But so smoothly you derived all that and it entered in mind.
Now i am feeling stress free and confident for this chapter even all the term 1 chapters because of your videos.

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