1 Conductor & Its properties | Conductors | Electrostatics Class 12 | JEE Mains & Advanced

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Topics covered in this Electrostatics (Class 12) by ABJ sir IITD with timestamp:-
00:00 - 00:51 Introduction of topic: This topic is also a part of the electrostatics chapter of class 12. This topic is harder than other topics of electrostatics. But there is a high chance of getting a question in JEE ADVANCED from this topic.
00:52 - 04:08 What is the conductor? : ABJ sir explains that conductors have many free electrons, which are responsible for the transfer of charge and energy. Metals are the best example of conductors.
04:08 - 08:52 Basic difference b/w non-conductors and conductors with the help of an example: ABJ sir explains the basic difference between the property of charge given to a metallic sphere or a non-metallic sphere.
08:52 - 18:50 Properties of conductor: Any charge given to a conductor will reside off an outer surface. ABJ sir also explains how this property affects the problem-solving related to the conductor with examples of solid spheres and infinitely long solid cylinders. A metallic solid sphere behaves as a charged spherical shell.
19:00 - 28:20 Properties of conductor: In electrostatic conditions, the Net Electric field inside the bulk of the conductor will be zero. ABJ sir also explains this property with an example of the metallic plate with the external electric field.
28:40 - 33:58 Electrostatics Problem 1: Based on the concept of the electric field inside the conductor: In this problem, we have a neutral spherical conductor of radius R. There is a Q charge at a distance r from the center of the conductor. We have to find the value of the net electric field at the center of the conductor, the electric field at the center due to charge Q, and the electric field at the center due to induced charge.
34:20 - 35:48 Properties of conductor: In electrostatic conditions, an electric force line will never enter a conductor.
35:57 - 41:23 Properties of conductor: In electrostatic conditions, the electric field at the conductor's surface is always normal/perpendicular to the surface. ABJ sir explains this point with an example. In Other words, Electric lines of force will strike the conductor normally.
41:40 - 47:19 Electrostatics Problem 2: Based on the concept ''Direction of the electric field is perpendicular to the surface of conductor'': In this problem, We have two charged metallic plate parallel to each other, one is positively charged, and the other is negatively charge sheet. There is a metallic sphere between both sheets. So we have to draw a rough sketch of the electric line of forces in the region. ABJ sir told us that the net electric field inside the conductor is zero, and the direction of the electric field is perpendicular to the conductor's surface.
48:00 - 54:04 Electric field at the surface of the conductor: ABJ sir explains the concept of gaussian surface in electrostatics lecture. Here to solve such problem, we will use the same concept. To find the electric field at the surface of the conductor, ABJ sir create a gaussian surface and using gauss law, we get the value of electric field at the surface of conductor.
54:04 - 58:02 Example on Electric field at the surface of the conductor: With the help of this example ABJ sir explains the relationship with surface density and radius of curvature, that is inversely proportional to each other.
58:15 - 01:12:11 Electric pressure: Advanced concept : ABJ sir derives the formula of electric pressure for any conductor. This formula is very important for the JEE Mains & Advanced.
01:12:11 - 01:29:29 Electrostatics