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C) is zero D) points inward I
5. A bar magnet is to the left of a circular wire (with no battery or
anything, just a bit of metal). Is there a current ﬂowing through the wire?
A) Yes B) Only if the magnet is moving C) No
6. Would you like an extra point?
A) Yes B) No S N Quiz #11 µ0 I d × R
4π R 3 FCACBA 1. A short segment of wire carries current to the right. What direction
does the magnetic ﬁeld (created by the wire) at the star point?
A) B) C)
E) inward ⊗ F) outward ⊙ I 2. The magnetic ﬁeld at the center of this ring of current...
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