In: Physics
Three parallel wires, each carrying a current I (left and right wire carry upward current and middle wire carries downward current....but all wires have the same magnitude current). Four points are identified on the picture as well. What are the directions of the magnetic fields at the four points, starting with point 1, then 2, etc.
1
Question options:
1: in, 2: in, 3: out, 4: out |
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1: in, 2: out, 3: out, 4: in |
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none of these |
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1: out, 2: in, 3: out, 4: in |
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1: out, 2: in, 3: in, 4: out |
Question
A wire is wrapped around a cardboard tube and carries a steady current in the direction shown (up in front, down in back). If an observer were inside the tube, near the center, which direction would the observer expect to experience the magnetic field?
Question options:
pointing into the picture |
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none of these |
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pointing to the left |
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pointing to the right |
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pointing out of the picture |
Question
Two concentric circular loops of wire each carry current I. The smaller loop has a clockwise current, while the larger loop carries a counterclockwise current. Point P is located at the center of both circles. What is the direction of the magnetic field at point P?
Question options:
out of the picture |
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there's no field, because the two contributions cancel |
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straight upward |
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into the picture |
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straight downward |
Question
How far apart must two parallel wires be if they both carry I = 24 A and have a force per unit length of interaction between them of 4.4 x 10^-3 N/m?
Question options:
2.6 cm |
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3.9 cm |
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1.3 cm |
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26 cm |
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13 cm |