1. There are four identical ammeters with resistance r and a resistor with resistance R connected in a circuit as shown in the figure. We know that the first two ammeters show I = 3A and I2 = 5A. Find the ratio R/r.

1. There are four identical ammeters with resistance r and a resistor with resistance R connected in a circuit as shown in the figure. We know that the first two ammeters show I = 3A and I2 = 5A. Find the ratio R/r.

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter9: Current And Resistance

Section: Chapter Questions

Problem 65P: Digital medical thermometers determine temperature by measuring the resistance of a semiconductor...

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Concept explainers

Temperature Variance of Resistance

Electrical resistance or simply resistance is the property of a material that opposes the free flow of electrons through it. The total amount of resistance to the flow of charges (or current) is affected by many factors like the length of the conducting material, its cross-sectional area, resistivity, and temperature.

Question

1. There are four identical ammeters with resistance r and a resistor with
resistance R connected in a circuit as shown in the figure. We know that the
first two ammeters show I = 3A and I2 = 5A. Find the ratio R/r.

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