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A battery of emf V and internal resistance i

A battery of emf V and internal resistance i

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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1) A battery of emf V and internal resistance r is connected in series with an ammeter with resistance TA and a resistor R. The current measured by the ammeter is I. a) Find the current through the circuit if the resister R is doubled to 2R. Express your answer in terms of ra, A. r, and R. (b) What is the maximum value of the ammeter resistance ra so that 90% of the power will be dissipated at the resister R in the circuit for R-5.5 2 and V=7.5V, r-0.2 2?
Transcribed Image Text:1) A battery of emf V and internal resistance r is connected in series with an ammeter with resistance TA and a resistor R. The current measured by the ammeter is I. a) Find the current through the circuit if the resister R is doubled to 2R. Express your answer in terms of ra, A. r, and R. (b) What is the maximum value of the ammeter resistance ra so that 90% of the power will be dissipated at the resister R in the circuit for R-5.5 2 and V=7.5V, r-0.2 2?
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