The ammeter described in Problem 1 is used to measure the current io in the circuit in Fig...

The ammeter described in Problem 1 is used to measure the current io in the circuit in Fig. 1. What is the percentage of error in the measured value?

Problem 1

The ammeter in the circuit in Fig. 1 has a resistance of 0.1 Ω. Using the definition of the percentage error in a meter reading found in Problem 2, what is the percentage of error in the reading of this ammeter?

Figure 1

Problem 2

Suppose the d’Arsonval voltmeter described in Problem 3 is used to measured the voltage across the 45 Ω resistor in Fig. 2.

a) What will the voltmeter read?

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b) Find the percentage of error in the voltmeter reading if

Figure 2

Problem 3

A d’Arsonval voltmeter is shown in Fig. 3. Find the value of Rv for each of the following full-scale readings: (a) 50 V, (b) 5 V, (c) 250 mV, and (d) 25 mV.

Figure 3