For a physics lab proving Kirchoff\'s Rule with a multimeter: 2. Knowing that th

Question

For a physics lab proving Kirchoff's Rule with a multimeter:

2. Knowing that the ammeter must be connected in series with the circuit and the voltmeter must be connected in parallel, what does this tell you about the internal resistance of each device?

3. Explain what the effect the DMM might have on the circuit when inserted to measure the current.

5. The current in a diagram (which I'm not able to show) flows to the right. Why? Give a qualitative explanation for your answer using the concepts from Kirchoff's Laws. I don't think the diagram is necessary as it just shows resistors in a circuit with the current flowing to the right as determined by the experiment.

Explanation / Answer

2.

Since the ammeter is connected in series, its internal resistance is very small since a large resistance will affect the current in the circuit

Since the Voltmeter is connected in parallel, its internal resistance is large so that very small current pass through the Voltmeter and it give the accurate value of Potential difference across the resistance.

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