Design a d’Arsonval voltmeter that will have the three voltage ranges shown in Fig. 1.a) S...

Design a d’Arsonval voltmeter that will have the three voltage ranges shown in Fig. 1.

a) Specify the values of R1, R2, and R3.

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b) Assume that a 750 kΩ resistor is connected between the 150 V terminal and the common terminal. The voltmeter is then connected to an unknown voltage using the common terminal and the 300 V terminal. The voltmeter reads 288 V. What is the unknown voltage?

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c) What is the maximum voltage the voltmeter in (b) can measure?

Figure 1