28. Magnetic Fields and Forces
Magnetic Force on Current-Carrying Wire
Multiple Choice
Multiple ChoiceA 5-m current-carrying wire (red line) is ran through a 4 T magnetic field (blue lines), as shown. The angle shown is 30°. What must the magnitude and direction of the current in the wire be when it feels a 3 N force directed into the page?
A
0.17 A @ 30° below the +x-axis
B
0.17 A @ 30° above the −x-axis
C
0.30 A @ 30° below the +x-axis
D
0.30 A @ 30° above the −x-axis
E
0.49 A @ 30° below the +x-axis
F
0.49 A @ 30° above the −x-axis
G
3.25 A @ 30° below the +x-axis
H
3.25 A @ 30° above the −x-axis
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