14- With regard to imperfections in solid metals, which of the following information is/are true? I- Motion of dislocations through grain boundaries requires extra energy. Il-Existence of impurity atoms in solid metal (alloying) would increase its electrical conductivity. III- Yield strength of a metal increases as the grain size decreases. A- Only I. B- Only II. C- Only III. D- I and III. E- H and II.

14- With regard to imperfections in solid metals, which of the following information is/are true? I- Motion of dislocations through grain boundaries requires extra energy. Il-Existence of impurity atoms in solid metal (alloying) would increase its electrical conductivity. III- Yield strength of a metal increases as the grain size decreases. A- Only I. B- Only II. C- Only III. D- I and III. E- H and II.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question

14- With regard to imperfections in solid metals, which of the following information is/are true?
I- Motion of dislocations through grain boundaries requires extra energy.
Il-Existence of impurity atoms in solid metal (alloying) would increase its electrical conductivity.
III- Yield strength of a metal increases as the grain size decreases.
A- Only I.
B-
Only II.
C-
Only III.
D-
I and III.
E-
H and II.

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