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Class notes Physics Physics : Textbook For Class Xi
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It covers everything about electrostatic induction
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Electrostatic whole chapter first class 12 class notes
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These topics are important for understanding capacitors, so make sure topay attention.
Agenda
Electrostatic potential energy
Electrostatic potential
Electrostatic potential for dipole and continuous bodies
Relation between electric field and potential
Today’s lecture will be brief, but it lays the foundation for understanding
capacitors. If you miss this lecture, you may struggle with capacitors later
on. So, stay tuned till the end!
Electrostatic Potential Energy
Let’s start with the concept of electrostatic potential energy. We have a
source charge and a small test charge at an infinite point. The source charge
wants the test charge to come closer, but the child playing a game is not
listening. So, the mother asks an external agent to bring the child to a point
inside the electrostatic field. The external agent does this work slowly, so the
velocity of the charge remains constant and there is no change in kinetic
energy. The work done by the external agent is stored as potential energy in
the system. This potential energy is known as electrostatic potential energy.
Electrostatic Potential
The electrostatic potential energy is defined as the work done in bringing a
charge from infinite position to a point in the electrostatic field. It is a scalar
quantity and depends on the charge configuration. We can calculate the
potential energy for a single charge or a system of charges using the
formula:
U = k * q1 * q2 / r
Where U is the electrostatic potential energy, k is the electrostatic constant,
q1 and q2 are the charges, and r is the distance between them.
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