Скачать или смотреть 17.3 Voltmeters, Ammeters, and Terminal Voltage | General Physics

Chad provides a brief lesson on Voltmeters, Ammeters, and Terminal Voltage. The lesson begins by explaining that voltmeters measure the potential difference across a resistor in a circuit, are connected in parallel with that resistor, and that an ideal voltmeter has infinite resistance. Similarly, an ammeter measures electric current through a resistor, but in contrast, is connected in series with that resistor, and an ideal ammeter has zero resistance.

The lesson concludes with an explanation of the internal resistance of a battery, and how that internal resistance results in the terminal voltage of the battery being lower than the emf of the battery.

00:00 Lesson Introduction
00:53 Voltmeters
02:31 Ammeters
06:10 Internal Resistance and Terminal Voltage

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