Question

How do I measure the Internal Resistance of both a voltmeter and a Battery ?

Answer 1

Answer:

When measuring the EMF of a battery and connecting the battery directly to a standard voltmeter, as shown in, the actual quantity measured is the terminal voltage V. Voltage is related to the EMF of the battery by V=emf−Ir, where I is the current that flows and r is the internal resistance of the battery.

Answer 2

Answer:

Explanation:

A voltmeter measures the open circuit voltage (OCV) with no load, followed by the second reading with a load; Ohm's law calculates the resistance value (voltage difference divided by current equals resistance).

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