Which of the following is not a point defect?

(a) Dislocation
(b) Interstitial
(c) Vacancy
(d) Frenkel


(a) Dislocation

Physics & Space Science

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At what distance from the central axis of a long straight thin wire carrying a current of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength of the Earth's magnetic field of about 5.0 × 10-5 T? (?0 = 4? × 10-7 T ? m/A)

A) 1.0 cm B) 2.0 cm C) 3.0 cm D) 4.0 cm E) 5.0 cm

Physics & Space Science

A 2.0-m long conducting wire is formed into a square and placed in the horizontal xy-plane. A uniform magnetic field is oriented 30.0° above the horizontal with a strength of 9.0 T. What is the magnetic flux through the square?

A) 1.1 T • m2 B) 1.9 T • m2 C) 2.3 T • m2 D) 18 T • m2

Physics & Space Science

Colors seen on TV result from color

A) addition. B) subtraction. C) either of these D) none of the above

Physics & Space Science

Two flat rectangular mirrors are set edge to edge and placed perpendicular to a flat nonreflecting surface. The edges of the two mirrors meet at a 30° angle. A light ray that enters parallel to mirror 2 reflects from mirror 1 and then from mirror 2 . The angle of reflection of that ray from mirror 2 is

a. 0°. b. 30°. c. 60°. d. 90°. e. 120°.

Physics & Space Science