12. What is the resistance of an ideal Voltmeter?

College Physics
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Author:Raymond A. Serway, Chris Vuille
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Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Electronic thermometer
Dr. Evil plans to poison special agent 006 (Jimmy Seal) with a chemical that is undetectable in
cold alcohol and water. He puts the wire of a Platinum Resistance Thermometer (PRT)
temperature sensor into the drink. The Platinum (Pt) wire has resistance of p =100.00 2 at a
reference temperature of 25.0°C. The ends of the wire are connected across an AC voltage of
10.00 10-3 Voltsrms. The radius of the wire is 0.050 mm, the length of the wire is 7.409
meters, and the thermal coefficient of resistivity of the wire is a = 0.00385 The wire is put
in a glass of rum to measure its temperature and the resistance of the drink at its current
temperature is 91.3 2.
1
K
12. What is the resistance of an ideal Voltmeter?
13. What is the resistance of an ideal Ammeter?
14. Calculate the Temperature of the drink. Remember to include UNITS!
.
Power Supply(
R
I Ammeter
V) Voltmeter
Transcribed Image Text:Electronic thermometer Dr. Evil plans to poison special agent 006 (Jimmy Seal) with a chemical that is undetectable in cold alcohol and water. He puts the wire of a Platinum Resistance Thermometer (PRT) temperature sensor into the drink. The Platinum (Pt) wire has resistance of p =100.00 2 at a reference temperature of 25.0°C. The ends of the wire are connected across an AC voltage of 10.00 10-3 Voltsrms. The radius of the wire is 0.050 mm, the length of the wire is 7.409 meters, and the thermal coefficient of resistivity of the wire is a = 0.00385 The wire is put in a glass of rum to measure its temperature and the resistance of the drink at its current temperature is 91.3 2. 1 K 12. What is the resistance of an ideal Voltmeter? 13. What is the resistance of an ideal Ammeter? 14. Calculate the Temperature of the drink. Remember to include UNITS! . Power Supply( R I Ammeter V) Voltmeter
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