This video first introduces resistors, their uses, and the different types. It then moves on to discuss monitoring devices, including voltmeters, ammeters, and variable potential divider circuits. Next, it covers power supplies, particularly electric cells. Lastly, the concept of internal resistance is introduced, including how to calculate it and how it increases over time.

00:00 Introduction
00:29 Electrical Components
00:36 Resistors
01:54 Monitoring Devices
02:11 Voltmeter
02:47 Ammeter
03:19 Variable Potential Divider
04:17 Power Supplies
04:31 Electric Cells
05:16 Preview finished!

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