(a) A voltmeter and an ammeter can be connected as shown in Fig. 1983a to measure a
Chapter 19, Problem 19.85(choose chapter or problem)
(a) A voltmeter and an ammeter can be connected as shown in Fig. 1983a to measure a resistance R. If V is the voltmeter reading, and I is the ammeter reading, the value of R will not quite be (as in Ohms law) because some current goes through the voltmeter. Show that the actual value of R is where is the voltmeter resistance. Note that if (b) A voltmeter and an ammeter can also be connected as shown in Fig. 1983b to measure a resistance R. Show in this case that where V and I are the voltmeter and ammeter readings and is the resistance of the ammeter. Note that if RA V R.
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