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You build a magnetic rail gun by placing two rails, both parallel to the x-axis. One rail passes through \(\langle 0, 1, 0 \rangle \, \text{m}\) and the other passes through \(\langle 0, -1, 0 \rangle \, \text{m}\), with a rod spanning the two rails that is parallel to the y-axis. A battery is hooked up to the two rails such that the negative terminal is connected to the top rail (passing through \(\langle 0, 1, 0 \rangle \, \text{m}\)) and the positive terminal is connected to the bottom rail (passing through \(\langle 0, -1, 0 \rangle \, \text{m}\)). When you do this, the rod spanning the two rails moves in the x-direction.

What is the direction of the magnetic field in the rail gun?

Answer :

Final answer:

The direction of the magnetic field in a rail gun can be determined using the Right Hand Rule, and in this case it would be flowing in the z direction.

Explanation:

The direction of the magnetic field in the rail gun, built by placing two parallel rails and a rod spanning the rails and attached to a battery, can be determined using the Right Hand Rule.

The Right Hand Rule states that if you point the thumb of your right hand in the direction of the electrical current (from negative to positive terminal), and then curl your fingers, the direction your fingers curl is the direction of the magnetic field.

In this apparatus, since the negative terminal is connected to the top rail and the positive terminal is connected to the bottom rail, electricity is flowing along the y-axis. Therefore, using the Right Hand Rule, the magnetic field would be flowing in the z direction.

In a magnetic rail gun, the direction of the magnetic field would be in the negative y-direction. This can be determined using the right-hand rule, where you point your fingers in the positive x-direction and sweep them upward to determine the direction of the magnetic field. The thumb should then point in the negative y-direction.

Learn more about Magnetic Field Direction here:

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