Physics 01
Image Formation by Convex Lens: All 6 Cases with Diagrams
Ray diagrams for all six object positions of a convex lens, with image distance and magnification worked out in the NCERT sign convention.
class 10
Physics 02
Ohm's Law Triangle and Power Formula, Explained Simply
How the V = IR triangle and the power wheel work, with NCERT-style worked examples, a table of all twelve formulas and the mistakes that cost exam marks.
Electronics 03
Series vs Parallel Circuits: Why Houses Are Wired in Parallel
Bulbs in series share the voltage and all go dark when one fails; in parallel each gets the full 230 V. Worked numbers, diagrams and a live simulator.