Magnetic field lines about a current-carrying wire
A)extend radially from the wire.
B)circle the wire in closed loops.
C)Choices A and B are both correct.
D)None of the above choices are correct.

Question

Quizplus · Accepted Answer

Magnetic field lines about a current-carrying wire circle the wire in closed loops according to the right-hand rule for magnetic fields. Option A is incorrect as the field lines do not extend radially from the wire. Option C is incorrect as it assumes both options are correct, but only option B is correct. Option D is also incorrect as there is a magnetic field around the wire.

Magnetic Field Lines About a Current-Carrying Wire