A laboratory magnet (see the figure) with a field B = 0.15 T over an effective a

Question

A laboratory magnet (see the figure) with a field B = 0.15 T over an effective area 8.0 cm in diameter exerts a force on a current-carrying wire that crosses between the pole faces at right angles to the field. The current in the wire is 12.0 A.
What is the magnitude of the force on the wire?

What is the direction of the force? (left, right, up, down, front, back)

Tries 0/99 A laboratory magnet (see the figure) with a field B = 0.15 T over an effective area 8.0 cm in diameter exerts a force on a current-carrying wire that crosses between the pole faces at right angles to the field. The current in the wire is 12.0 A. What is the magnitude of the force on the wire? Tries 0/99 What is the direction of the force? (left, right, up, down, front, back) Tries 0/2 Figure 19.14 Example 19.3: A current-carrying wire in a magnetic field.

Explanation / Answer

Part A)

Apply F = BIL

F = (.15)(12)(.08)

F = .144 N

Part B)

For the direction, I need the figure that you did not include. Apply the right hand rule, however, and you can figure it yourself.

With your right hand, put your thumb in the direction of the current and your fingers in the direction of the magnetic field. The force is the direction your palm is facing.

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