Answer
Material A. See below.
Work Step by Step
Ohm's law states that $V=IR$. Therefore, the sketch of voltage to current must be constant. The curve A is linear, so Material A must satisfy Ohm's law.
Physics Technology Update (4th Edition)
by Walker, James S.
Published by
Pearson
ISBN 10:
0-32190-308-0
ISBN 13:
978-0-32190-308-2
Chapter 21 - Electric Current and Direct-Current Circuits - Problems and Conceptual Exercises - Page 754: 9
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