Answer
$10ohms$
Work Step by Step
Equivalent resistance = 10 ohms
From the arrangement we have :-
$\frac{1}{2R}+\frac{1}{20}=\frac{1}{10}$
or, $R=10ohms$
College Physics (7th Edition)
by Wilson, Jerry D.; Buffa, Anthony J.; Lou, Bo
Published by
Pearson
ISBN 10:
0-32160-183-1
ISBN 13:
978-0-32160-183-4
Chapter 18 - Basic Electric Circuits - Learning Path Questions and Exercises - Exercises - Page 653: 2
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