A 270 resistor is connected across a battery and a 31-mA current flows. When the resistor is

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A 270Ω resistor is connected across a battery and a 31-mA current flows. When the resistor is replaced with a 120Ω resistor, the current increases to 63-mA. Find
(a) the battery’s voltage
(b) its internal resistance.

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Related Book For  answer-question

Essential University Physics

ISBN: 978-0321976420

3rd Edition Volume 2

Authors: Richard Wolfsonby

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