Sureshiisj

Conductors have a lot of electrons almost in the range of 1029 per cubic m. So, subjecting conductors to an external field usually results in the rearrangement of the electrons such that the positive ions are away from the Electric field and the negative ones closer to the electric field. This gives rise to an induced electric field that grows on strength till it becomes equal to the external field.  So, inside the conductor, the net electric field is zero.  Using this property, we can find other attributes of the electrostatics of the conductors.  The major attributes are as follows; (1) The electric field inside a conductor is zero.  (2) The external electric field will always be perpendicular to the surface of the conductor.  (3) The charge inside a conductor is zero.  (4) The potential of a conductor is constant.  (5) The electric field due to a conductor is given by E = σ/εₒ\ (6) The zero value of the electric field inside the conductor helps to h...

 Electrostatic potential due to positive charge is q/4πεₒr and physically it requires work to bring another charge at position r to overcome the force of attraction. If unsupported the charge thus brought will be repelled and accelerated away. Similarly, for a negative charge, the potential is given by  (-q)/4πεₒr and it means that we need to prevent a positive test charge from bumping into the negative charge. If unsupported, the negative charges will be attracted and accelerated towards the negative charge.  A dipole has positive and negative charges of the same magnitude separated by a certain distance which is of the order of angstrom. At the center of the dipole, there is zero potential. The potential of a dipole is zero if the point happens to be equidistant from the positive and the negative charges. So, for a point on the perpendicular bisector, the potential is always equal to zero. However, it will be influenced by either of the charges if the point is closer to...

  Introduction: Electrostatic potential due to positive charge is q/4πεₒr and physically it requires work to bring another charge at position r to overcome the force of attraction. If unsupported the charge thus brought will be repelled and accelerated away. Similarly, for a negative charge, the potential is given by  (-q)/4πεₒr and it means that we need to prevent a positive test charge from bumping into the negative charge. If unsupported, the negative charges will be attracted and accelerated towards the negative charge.  A dipole has positive and negative charges of the same magnitude separated by a certain distance which is of the order of angstrom. At the center of the dipole, there is zero potential. The potential of a dipole is zero if the point happens to be equidistant from the positive and the negative charges. So, for a point on the perpendicular bisector, the potential is always equal to zero. However, it will be influenced by either of the charges if th...

 

 

 Chapter 2: Electrostatic Potential and Capacitance.  Starting from the concept of electrical work, we establish the concept of electrostatic potential energy. This energy per unit charge is defined as the electric potential. We obtain an expression for the potential of a source charge by bringing a unit test charge from infinity to a location in the space. Similarly, using the geometry, we can find the potential due to the dipole.  Moreover, we can relate the electric field and the potential also. Usually, the electric field is taken as the negative of the potential gradient.  To create a system of charges, we have to spend some energy and this will be stored as the potential energy of the system. The same logic can be extended for rotating a dipole in an external field. Here also, by doing work against the net torque of the uniform external field, we can store the energy in the dipole.  A very interesting point of discussion in Chapter 2 is related to the elec...

 

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CBSE has not updated/published the syllabus for 2022-2023. For the time being, we will continue with the last year's syllabus. The syllabus is as follows for Term 1 and Term 2;