1. [10pt] Which of the following statements for magnetism are true? (Give ALL co

Question

1. [10pt] Which of the following statements for magnetism are true? (Give ALL correct answers, i.e., B, AC, BCD...) A) For a bar magnet, the B-lines exit through the N pole and return through the S pole.

B) Unlike magnetic poles attract.

C) The direction of B is indicated by the N pole of a magnetic needle.

D) The magnitude of earth's B is about 1E-4 Tesla.

E) B acts only on charges at rest.

F) B does work on a charge only when the charge has a velocity component perpendicular to B.

G) The earth's B-lines are parallel to the earth's surface at all points.

Explanation / Answer

(A) TRUE

(B)

TRUE

(C)TRUE

(D)

TRUE

(E)

FALSE

(F)

FALSE

(G)

FALSE

so TRUE OPTIONs are

ABCD

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