Chapter 32-Electric current

Above image – video credits to Techquickee….see their video, I would recommend it
Link:  https://www.youtube.com/watch?v=OEL5laB3hfU

Above , as a budding student of ELECTRONICS, you are looking at a real-life scenario.

Resistors are always connected in a large complicated circuit . The whole circuit is a practical thing, and is actually fitted on a flat board, commonly called PCB (Printed Circuit Board)

Resistances above have coloured bands, to help anyone calculate their Resistance Value in Ohms, this is explained in our video under the courses.

Modern resistances don’t have coloured bands. They look more like little SILVER & BLACK RECTANGLES ! See below image where the red arrows point to the resistances. (image credits to Techquickee)

By the way, the large cylindrical things fitted on the board are CAPACITORS.

To study Electric current , you have to master Ohm’s Law and Kirchoff’s Laws for circuits. Interesting animations help to get a feel of resistances, series and parallel circuits, and circuits with junctions. A section on capacitors charging and discharging, is included here too.

Following topics are covered:

1) Introduction- what is Electric Current (Flow of electrons)

2) Drift current and speeds

3) Resistors and Resistances

4) Resistors: Colour bands for identification

5) Ohm’s Law

6) Energy Transfer in a circuit- Heating up of resistors

7) Combining Resistors in Series and Parallel

8) Kirchoff’s Law, Junction Law

9) The LOOP Law

10) Wheatstone Bridge

11) Solved Problems