12P01 Electric Charges and Fields

12P01 Electric Charges and Fields NCERT Sol Competency 2023 Sol Competency 2024 Sol

Topic 1: Electric Charges, Coulomb's Law Concept Quiz NEET

Topic 2: Electric Dipole, Axial line, Equatorial line, In external electric field, equilibrium, stable unstable Concept Quiz NEET

Why is the direction of Electric Dipole taken from negative to positive?

Topic 3: Gauss law and its applications, Electric Field, Electric Flux through Gaussian surfaces, Charges kept at different locations of cube  Concept Quiz NEET

Electric Field in different regions of Charged Solid metal sphere surrounded by a Concentric spherical Shell

Topic 4: Charged Particle in a Uniform Electric Field   Concept Quiz1   Concept Quiz2   Concept Quiz3

Charged balls hanging from two strings attached to a fixed point   Level 1   Level 2

Various possible SHM oscillations in charges JEE Main 

Electric Field and Voltage due to a infinitely spread thick slab , inside and outside the slab Concept

Electric Field and Voltage due to a uniformly charged Arc

Electric field due to a small dipole at a general point - concept 

Induced charges on an uncharged sphere due to a charge outside the sphere

Step-by-step

Step 1: Theory and Concepts

NCERT Text book, Handbook Study notes

Step 2: Numerical Practice

NCERT Examples, NCERT Exercises with solutions

Step 3: Numerical Practice

Chapterwise CBSE Past papers (Any one of them- Arihant, MTG, XAM Idea etc.)

Step 4: Numerical Practice

NCERT competency based questions 2024, Solutions

NCERT competency based questions 2023, Solutions

Step 5: Numerical Practice

NCERT Exemplar Questions, Solutions

NEET past year Questions, Solutions

JEE Main past year Questions, Solutions

Two charges and Forces between them.

Plot F vs. r graph to see the shape of the graph.

Three Charges and Forces between them.

Electric Field Strength and Voltage at a given point.

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

Simplified Millikan's Oil drop Experiment.

Millikan's Oil Drop Experiment: Amrita Virtual Labs

Charge of an Electron or Elementary Charge e 

Keep the X-ray switch ON for few seconds to ionize the air.

Charged Particle in a Uniform Electric Field

Calculate the vertical distance from the center line from which the particle will exit the plate region?

https://guruacademyandlabs.blogspot.com/2025/03/charged-particle-in-uniform-electric.html

What is Earthing? Vande Graff Generator working, 

Charges flowing through human body.

Vande Graff generator

Always lot of fun to play with vande graff generator, a "hair-raising" experience. Charges held in the body, as the person is standing on a plastic chair (insulator). So the Charges do not flow or discharge to the ground through the body causing electrical shock. Charges flowing to the ground is called grounding or earthing.

Electric Field Lines around Charges, Academo.org

Electric Field lines around one or two charges, Electric Dipoles can be studied well.

Electric Dipole kept in an External Electric Field E

Turn the dipole in different direction angles to see how it falls back to its original position.

(Dipole moment direction is -ve to +ve, but here in Chemistry conventions it is taken differently. So do not get confused.)

Understanding \[y=\frac{1}{x^2}\hspace{30mm}y=\frac{1}{x}\]graphs for identifying Electric Field and Electric Potential Curves.

\[E=\frac{1}{4\pi\epsilon_o}\frac{Q}{r^2}\hspace{30mm}V=\frac{1}{4\pi\epsilon_o}\frac{Q}{r}\]

Electric Fields as a function of x and y can be plotted to visualize the field.

Why is there a chain hanging to the ground, especially in vehicles carrying inflammable liquids?

Inverse square law, all tv shows still travelling in the space

https://youtube.com/shorts/LCqr71-23Vo?si=wPM-5up-qWJQZ4m3

Lightning explained