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April 24, 2014

Homework Help: PHYSICS PLS HELP

Posted by james on Wednesday, April 14, 2010 at 12:45am.

Internal resistance problem.
Suppose that in Figure 3.3, Vo=13V, R1=250kphm, R2=375kohm, and Ri=1.9Mohm. Initially, the voltmeter is disconnected.

EXAMPLES:
What is the voltage across R2? [Answer: 7.8 V.]
What is the voltage across R2 with the meter connected? [Answer: 7.22926829268293 V.]

QUESTION:
If the internal resistance of the meter were 15 M , what is the voltage across R2?

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