
Explore Coulomb's law for point charges and extended charged bodies, with vector forces, attraction or repulsion, superposition, and the shell theorem about zero force inside a uniformly charged shell.
Apply Newton's second law and Coulomb's law to two positive charges, solving for m2 and q from the given accelerations and separation.
Place a third charge on the x-axis to balance forces from Q1 (+1 μC) and Q2 (−3 μC) 10 cm apart, yielding a zero-net-force position 14 cm left of Q1.
Apply integral calculus to find the total charge on a spherical shell with inner radius r1 and outer radius r2, given rho = B/R, yielding Q = 2πB(r2^2 - r1^2).
On the xy plane, charge one reaches equilibrium under the forces from charges three, four, and two (Q2 = 5Q). Charge two must be about 1.92 centimetres from the origin.
Balance electrostatic and gravitational forces between Earth and Moon with Coulomb's and Newton's laws, yielding about 5.7e13 C and hydrogen ions totaling ~3.6e32.
Examine how contact and grounding move charge among bodies, from cat fur rubbing to earth. Observe how sparks reveal electron flow between finger and faucet.
Ready for the next step? Continue on The Science Cube with the complete pre-university Physics program: AP Physics 1/2 & C (US), A-Level Physics (UK/Cambridge), IB DP Physics HL/SL, Canadian Grade 11–12 (e.g., Ontario SPH3U/SPH4U), and Australian HSC/VCE/QCE. Step-by-step problem solving, past-paper practice, downloadable notes, mind maps, and interactive simulations
Explore electric fields and field lines, examining dipoles and line charges, uniform fields, and how a test charge reveals field strength, direction, and superposition.
Derive the electric field on the axis of a charged ring by integrating vertical components; symmetry cancels horizontal parts, linking E to Q and z via the ring's geometry.
Compute electric field on the axis of a disk with surface charge density sigma by summing ring contributions and integrating, showing that an infinite disk yields E = sigma/(2 epsilon0).
The lecture shows how an electric field exerts torque on a dipole, doing work as it turns, and derives the dipole's potential energy U_alpha = - B cos alpha.
Understand how electric flux through a closed surface reveals the enclosed charge, with outward flux for positive and inward flux for negative; net flux depends only on the enclosed charge.
Apply Gauss's law to a surface enclosing a charge and find that flux equals the net enclosed charge divided by epsilon not, independent of shape or radius.
Apply Gauss's law to solve electric fields for spherical, cylindrical, and planar charge distributions. Explore how symmetry and Gaussian surfaces yield flux and field values, using spheres, wires, and sheets.
This Physics course includes -
Coulombs law
1. Charge and electrostatic force
2. Coulomb's law
3. Coulomb's law and Newton's force
4. Coulomb's law and charge distribution
Electric fields
5. Electric field
6. Dipoles and dipole moment
7. Electric field due to ring
8. Electric field charged disc
9. Potential energy of an electric dipole.
Gauss Law
10. Electric flux
11. Measuring electric flux
12. Gauss law
13. Application of Gauss Law
14. Charge inside a cavity
How I make my courses:
When I create content for lessons in physics, I think deeply around the areas where students struggle and feel confused. My lessons tackle these parts in depth. Also, I believe visual representation of various ideas in physics makes a lot of impact. The lessons have visuals and animations that are thought through for faster learning and absorption of the subject
And most importantly, I make myself available to answer questions of students enrolled in my course
My students (some are wonderful teachers too) wrote this to me
Bobbie Smith: Amazing explanations, I really learned a lot. Thank you.
Satyam Jha: amazing!! i could not understand vector physics in my class but here it is very easy to understand Thanks!!
Csaba (teacher): I learned new ideas. I'm looking to try them in my professional practice as a physics teacher. Thanks! :)
Fernando P. Radaza: It help me a lot to understand better about physics of Work, Power & Energy.
Chamara Dilshan: it's good, explaining every small thing ,it's good to start physics beginners
Onofrio : The lessons given by the teacher are very interesting! Excellent course!
Simaran: Very deep understanding of the subject
Shiva: Very knowledgeable and sounds very nice and helpful
Gallina: Excellent the lessons held by the teacher with exhaustive explanations and well illustrated. Well done course!
Smith: Great course.The presentation is very clear. Thank you.
Pawan Kumar: The way to teaching us is amazing with all diagrams
Samit This course has a lot of good content and very well presented. Thank you
Dani (teacher): It was concise and consequent. The exercises were good exposed and explained. Simply excellent. I promise, that i will use some ideas in my every day practice in my classroom. I'm also teaching physics, but in Hungarian. I finished this course to improve my skills, first of all in interesting approaches, and foreign language skills as well. This course was exactly what I expected!
Who is this scores for: AP physics students, high school physics students (grade 11 physics and grade 12 physics), IITJEE, NEET IB students and IGCSE students