Internal Resistance and EMF - IB Physics

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0:00 Definition
0:55 Example
2:12 Electromotive Force (EMF)
4:02 Voltage vs Current Graph
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A researcher in distant memory... like a researcher in the fog... and the weather is clear and perfect with you...

usamamando
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When most types of batteries are failing, their internal resistance goes up. Measuring the terminal voltage with a digital (high-impedance i.e. very low load) voltmeter often shows a "normal" voltage, which is why battery voltage should be tested under load conditions. With a car battery, switching on the headlights will bring down the terminal voltage of a bad battery, and the headlights will also go dim very soon.

karhukivi
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Hey there, the link to the video for internal resistance and EMF on your website leads to a private video, so you should probably update it to this one instead

sploof