You have been told that the dc voltage of a power supply is about 350 V. When you go to the instrument room to get a dc voltmeter to measure the power supply voltage, you find that there are only two dc voltmeters available. One voltmeter is rated 300 V full scale and has a sensitivity of 900 Ω>V. The other voltmeter is rated 150 V full scale and has a sensitivity of 1200 Ω>V.
a) How can you use the two voltmeters to check the power supply voltage?
b) What is the maximum voltage that can be measured?
c) If the power supply voltage is 320 V, what will each voltmeter read?
