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Why can the internal resistance of the DMM can be determined without taking into account the...

Why can the internal resistance of the DMM can be determined without taking into account the 100 Ω resistor? Could this be done for a resistor of any resistance value? Explain your answer.

A 500 μF capacitor is wired in series with a 5 V battery and a 20 kΩ resistor. What is the voltage across the capacitor after 20 seconds of closing the circuit? Show all calculations in your answer.

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