Consider a long thin straight wire with a current I. Which of the following statements about the magnetic field lines is true?




A. Field lines are parallel to the wire.
B. Field lines are perpendicular to the wire.
C. Field lines are directed radially away from the wire.
D. Field lines are circles centered on any point on the wire.


1.A only
2.B only
3.C only
4.D only
5.A and C only
6.B and D only
7.B and C only
8.None of them is true.


6

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