A resistor of unknown resistance and a 30-2 resistor are connected across a 20- V emf in such a way that a 2.0 A current is observed in the emf. What is the value of the unknown resistance? Select one: a. 5 ОНМ b. 7.5 OHM с. 30 ОНМ d. 15 OHM

A resistor of unknown resistance and a 30-2 resistor are connected across a 20- V emf in such a way that a 2.0 A current is observed in the emf. What is the value of the unknown resistance? Select one: a. 5 ОНМ b. 7.5 OHM с. 30 ОНМ d. 15 OHM

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Question

A resistor of unknown resistance and a 30-2 resistor are connected across a 20-
V emf in such a way that a 2.0 A current is observed in the emf. What is the value
of the unknown resistance?
Select one:
a. 5 OHM
b. 7.5 OHM
C. 30 OHM
d. 15 OHM
e. 75 OHM

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