Can someone please explain how to do these questions. I'm not very good at circuits.
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AQA AS/A level physics, Electricity question watch
- Thread Starter
- 18-09-2017 18:12
- 18-09-2017 20:03
The oscilloscope is being used as a volt meter.
for this type of internal resistance question you want to make a couple of measurements
1. the open circuit potential across the battery - with an open circuit, i.e. no current flow this is equal to the EMF of the battery.
2. the potential across the battery with a load resistor in circuit. in this situation a current flows through the internal resistance of the battery and therefore there is a potential across the internal resistor pointing in the opposite direction to the current flow.