Current Electricity full chapter in Oneshot 2024-25 🔥 || Chapter 3 Class 12 Physics

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Current Electricity Class 12 | Chapter 3| CBSE NEET JEE |One Shot
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[krishvi]

Definitions at a glance

1)The rate of flow of electric charge in a definite direction within a cross section is called as Electric Current.

2)If 1 coulomb of charge flows through any area of crosssection within 1 second, then the current is said to be of 1 Ampere. 39:43 ans 1.12 x10^-3, 41:31 ans 10.88 x 10^-4

3) Current density is defined as the current flowing per unit area when held perpendicular to the flow of charge.
* Absolute zero i.e -273 degree celsius mein electrons ki energy zero hogi.

4) Drift Velocity- The avg. velocity of all the electrons in a conductor with which they gets attracted towards the positive end of conductor. < Consistency is the key i.e. Kachue ki chal>

5) The time between two successive collision of electrons is k/a Relaxation time. Inversely proportional to thermal velocity.


*** COMPLETED TILL 1:21:07 ***
😍

6) The drift velocity for electric field is called as mobility, it is independent of potential difference.

7) According to ohm's law the current flowing in a conductor is directly proportional to the potential difference across the two ends of the conductor, provided that the physical condition like temperature length etc of the conductor remains constant.

8) The obstruction in the path of current due to the collision between two electrons & ions is k/a Resistance.

9)The resistance of 1 unit volume of a conductor is k/a Specific Resistance/ Resistivity. ** The reciprocal of Resistance is Conductance.

10) 1:32:27 important 2nd case
11) The max potential differernce between the two terrminals of a cell in an open circuit- EMF

12) The power that is rated on the devices at a given voltage i.e.220 volt- Rated Power

13) 4:04:02 ans - 82.64 watt
Completed till 4:04:18

14) Series- Resistance ⬆️ then bulb glow ⬆️

Iska ulta in parallel - R ⬇️ then bulb glow ⬆️

4:18:40
Finally Done 😂🎉🎉🎉

[yasir__.]

5:00 start
18:30 electric current
31:20 basics for numericals
34:40 questions
45:30 current density
48:28 question
55:30 drift velocity
1:02:30 relaxation time
1:04:30 relation between current intensity and drift velocity
1:11:00 drift velocity derivation
1:21:15 mobility
1:23:20 OHM'S LAW
1:43:00 relation between free electron density and resistivity
1:50:09 effect of temperature on resistence of conductor
1:52:08 effect of temperature on alloys
1:57:10 thermal coefficient of resistence
2:12:50 electromotive force
2:25:35 internal resistence of cell
2:30:00 relation b/w emf terminal voltage and internal resistence
2:50:03 equivalent emf
3:04:15 condition for max and min current
3:20:50 kirchhoffs rule
3:41:00 wheatstone bridge
3:55:20 elctrical energy and power

[ALIKHAN-sn]

Definitions at a

1)The rate of flow of electric charge in a definite direction within a cross section is called as Electric Current.

2)If 1 coulomb of charge flows through any area of crosssection within 1 second, then the current is said to be of 1 Ampere. 39:43 ans 1.12 x10^-3, 41:31 ans 10.88 x 10^-4

3) Current density is defined as the current flowing per unit area when held perpendicular to the flow of charge.
* Absolute zero i.e -273 degree celsius mein electrons ki energy zero hogi.

4) Drift Velocity- The avg. velocity of all the electrons in a conductor with which they gets attracted towards the positive end of conductor. < Consistency is the key i.e. Kachue ki chal>

5) The time between two successive collision of electrons is k/a Relaxation time. Inversely proportional to thermal velocity.


* COMPLETED TILL 1:21:07 *
face-blue-star-eyes😍

6) The drift velocity for electric field is called as mobility, it is independent of potential difference.

7) According to ohm's law the current flowing in a conductor is directly proportional to the potential difference across the two ends of the conductor, provided that the physical condition like temperature length etc of the conductor remains constant.

8) The obstruction in the path of current due to the collision between two electrons & ions is k/a Resistance.

9)The resistance of 1 unit volume of a conductor is k/a Specific Resistance/ Resistivity. ** The reciprocal of Resistance is Conductance.

10) 1:32:27 important 2nd case
11) The max potential differernce between the two terrminals of a cell in an open circuit- EMF

12) The power that is rated on the devices at a given voltage i.e.220 volt- Rated Power

13) 4:04:02 ans - 82.64 watt
Completed till 4:04:18 yougotthis

14) Series- Resistance ⬆ then bulb glow ⬆

Iska ulta in parallel - R ⬇ then bulb glow ⬆

4:18:40
Finally Done 😂🎉🎉🎉

[bofficial]

4:07:08
~60W bulb will glow brighter.
~In a series connection, the current is the same for all bulbs, but the voltage is divided among them. Since power consumption is directly proportional to the square of current (P ∝ I^2), and current is the same for all, the bulb with the highest wattage rating will have the highest resistance.

Using Ohm's Law: Resistance (R) = Voltage (V) / Current (I)

The bulb with the highest resistance will have the highest voltage drop across it, resulting in less voltage available for the other bulbs.

In this case:

- 20 W bulb will have the lowest resistance
- 60 W bulb will have the highest resistance

Since the 60 W bulb has the highest resistance, it will have the highest voltage drop, and therefore, it will glow brightest.

So, in a series connection:

- 60 W bulb will glow brightest
- 40 W bulb will glow dimmer
- 20 W bulb will glow dimmest

Note that this is assuming the same voltage rating for all bulbs. If the voltage ratings differ, the analysis would need to be adjusted accordingly.

[Vanshjaat]

ans of 2nd question-1.12*10^-3A
and
ans of 3rd question-10.88*10^-4A

[debasisswain]

39:41 1.12× 10-³A
41:11 10.88×10-⁴A
04:03:56- 82.64 w

[ShivamRekhi]

As a senior my advice follow him blindly you will get very good Marks in you exam but remember pratice is very important

[RamanChauhan-ur]

2:08:31

The resistance of tungsten at 500°C will be approximately
342.48 ohms.

2:12:43

249 degree Celsius

[Your_motivation]

39:39 1.1×10-³A
41:02 10.88 ×10-⁴A
4:04:01 82.6w

[Moonie-sy]

Electric current - 6:30
Numerical hints - 31:45
Current density - 45:50
Drift velocity - 55:32

[Saimehak]

39:02- the current is 1.12*10^-3 ampere
41:27- 1.088*10^-3 ampere

[PratyushDas-rtvt]

Iss chapter ko maine bohot sare you tube channel se padha but sir ne jo deep concept bataya hai wo koi bhi one short per apko nahin milega and sir ke teaching style amazing hai pura basic se padhate hain sir plz aise hi lecture late rahiye hamre hobot kam ka hai 🙏❤

[Purple_Verse]

39:45 :- ans) 1.12 * 10"-3 A
41:25 :- ans) 1.088 * 10"-3 A

[rameshchand]

39:39 -> 0.00112
41:08 -> 0.001088

[kanakmaheshwari]

The way he explains every chapter is just amazing!!!
You made the chapter so easy to understand!
Thank you sir!!!👏🏻🙏🏻

[Vijay-pixi]

1:32:00 you made mistake sir volume = l *A
New volume = 2l *A'=l*A
=>A'=A/2
It is not A/4

[zisanali]

vote for moving charges and magnetism ♥♥♥♥👉👉👉👉👉

[IMANGHOSH-qnek]

3:14:12 Mixed combination for max and min
3:20:49 kirchoffs rule
3:41:44 whetstone Bridge

[ABCDE-pwlb]

1:22:55 how drift velocity does not depend on
The flow of current is nothing but drift velocity of electrons. Since current is directly proportional to voltage applied, drift velocity of electrons will also be directly proportional to the voltage

[krishikasahay]

2Q - 1.1 x 10^-3 A
3Q - 1.08 x 10^-3 A
4:04:15 - Pcon. = 82.6W