An ammeter model consists of an ideal ammeter in series with a 20-Ω resistor. It is connected

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An ammeter model consists of an ideal ammeter in series with a 20-Ω resistor. It is connected with a current source and an unknown resistor Rxas shown inFig. 2.133. The ammeter reading is noted. When a potentiometer R is added and adjusted until the ammeter reading drops to one half its previous reading, then R = 65 Ω. What is the value of Rx?

Ammeter model A,

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Fundamentals of Electric Circuits

ISBN: 978-0078028229

6th edition

Authors: Charles K Alexander, Matthew Sadiku

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