12P02 Electric Potential and Capacitance

12P02 Electric Potential and Capacitance NCERT Sol

12P02A Electric Potential 

Topic 1: Electric Potential, Potential Energy, Potential difference concepts, V due to a point charge. Concept Quiz 

Topic 2: V due to an Electric Dipole, Special cases, Rotational work done by a Dipole in an External Electric Field, Rotational Potential Energy stored in a Dipole in an External Electric Field. Concept Quiz NEET

Topic 3: V due to a system of multiple Charges, Work done to assemble multiple charges to a given configuration, Work done or energy of a charge inside an external electric field, Work done or energy of two charges inside an external electric field. Concept Quiz NEET

Self Energy of Spherical Shell and Solid Sphere

Self Energy of two small Dipoles aligned in a straight line

Topic 4: Equipotential surfaces due to point charge, in uniform external electric field, in a dipole, in a region of two charges of same polarity, Electric field perpendicular to equipotential surface, Equipotential surfaces in a non-uniform electric field. Concept Quiz

Topic 5: Relationship between electric field and voltage, conservative field concepts, E and V inside a uniform electric field. Concept Quiz Graph Based Quiz Higher Difficulty Interactive Quiz

Topic 6: Electrostatics of Conductors, Electrostatic shielding, Voltage inside a spherical shell, E perpendicular to the surface, E at the surface. Concept Quiz

Topic 7: Redistribution of charges in spheres, Vande Graff principles, action of points, charges always flowing from inner sphere to outer sphere, Voltage and charges in sphere while earthing. Concept Quiz ConceptQuiz

12P02B Capacitors 

Topic 1: Capacitor Basics, Capacitor without dielectric, Energy stored, Energy Density, Force of attraction between plates, series and parallel, potential or voltage divider in series, redistribution of charges in parallel. Interactive Concept Quiz    Advanced Quiz   NEET

Topic 2: Capacitors with Dielectric. Concept Quiz1 Concept Quiz2 NEET

Topic 3: RC charging circuits - Transient Currents. Experimental vs. Mathematical Model

Oscillation of one of the capacitor plate attached to a Horizontal Spring and Other plate fixed

Voltage or Current Divider Formulas for Resistors and Capacitors in series or parallel

Understand how much distance I have to move to cause a voltage difference of 1 V 

a) Far away from the source charge b) Very close to the source charge. 

Connect that finding with Conservative Force / Field concepts

$E= - \frac{dV}{dr} \; \;  F = -\frac{dU}{dr}$

Equipotential Lines for two charges separated by a distance 

a) oppositely charged b) same charged

 

Why E perpendicular to surace

Electric potential Playlist 

Capacitor Basics

What is a capacitor? What is that 80V in the Label? What is the resistor doing here?

Capacitor Basics

Change the battery voltage and see what happens to 

the charge and the voltage in the capacitor, Q = C V

Change the area and gap between the plates and see what happens 

to the Capacitance value, C = epsilon_o A / d

Capacitors in Series and Parallel and combination of both.

For Series connection Charge Q is same in both capacitors,

V = V1 + V2

Q/C = Q/C1 + Q/C2

1/C = 1/C1 + 1/C2

Double check the voltage and charge calculations with simulation results.

For Parallel connection Voltage V is same in both capacitors,

Q = Q1 + Q2

C V = C1 V + C2 V

C = C1 + C2

Double check the voltage and charge calculations with simulation results.

Introduction of Dielectric, Battery Disconnected

As Dielectric is introduced, see what happens to the 

Voltage, Electric Field, Charge, Capacitance, Energy.

Introduction of Dielectric, Battery Connected

As Dielectric is introduced, see what happens to the 

Voltage, Electric Field, Charge, Capacitance, Energy.

Redistribution of Charges in Capacitors

Charged capacitor becomes an Open Circuit (in steady state)

Voltage Divider Formula in Capacitors 

Capacitor plates pulled apart.

1) Battery Disconnected 2)Battery Connected

What happens to the Charge Q, Voltage V, Electric Field E, Capacitance C and Energy U?