You want to determine the emf & and internal resistance r of a battery you found, as well as the resistance R of a resistor, so you connect a voltmeter and an ammeter (both assumed to be ideal) as shown in the figure on the right. a) What is the resistance of an ideal voltmeter? b) What is the resistance of an ideal ammeter? When the switch is open, the voltmeter shows a reading of V₁ = 12 V and the ammeter shows a reading of I₁ = 0 A. You close the switch and the readings change to V₂ = 9 V and I2 = 3 A. c) What is the circuit resistance R? d) What are the emf & and internal resistance r of the battery? S ww R E

You want to determine the emf & and internal resistance r of a battery you found, as well as the resistance R of a resistor, so you connect a voltmeter and an ammeter (both assumed to be ideal) as shown in the figure on the right. a) What is the resistance of an ideal voltmeter? b) What is the resistance of an ideal ammeter? When the switch is open, the voltmeter shows a reading of V₁ = 12 V and the ammeter shows a reading of I₁ = 0 A. You close the switch and the readings change to V₂ = 9 V and I2 = 3 A. c) What is the circuit resistance R? d) What are the emf & and internal resistance r of the battery? S ww R E

Inquiry into Physics

8th Edition

ISBN:9781337515863

Author:Ostdiek

Publisher:Ostdiek

Chapter7: Electricity

Section: Chapter Questions

Problem 15Q: (Indicates a review question, which means it requires only a basic understanding of the material to...

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