credit if answer is wrong. 1. (6 pts] Three particles travel through a region of

Question

credit if answer is wrong. 1. (6 pts] Three particles travel through a region of space where the magnetic field is out of the page, as shown. The electric charge of each of the three particles is respectively 3 Particle 1 is a. neutral b. positive c Particle 2 is a. neutral b. positive c. negative Particle 3 is a. neutral b. positive .negative 2. I5 pts] A bar magnet is moving vertically upward toward a horizontal coil. The poles of the bar magnet are labeled X and Y. As the bar magnet toward the coil, the coil has an induced current with the orientation shown (to the right on the wire facing the viewer). What are the correct polarities of the magnet? a. X is a south pole, Y is a north pole. b. X is a north pole, Y is a south pole. c. The answer depends on whether you are in the southern or northern hemisphere 3. [6 pts] The magnetic field at points 1-4 is caused only by the current in the wire shown. At point 1, the magnetic field has a strength of 10 mT. Assume that the wires overlap closely and that points 1 to 4 are equally distant from the wires adjacent to them. Lastly, assume that any wires not immediately adjacent to a point, do not affect the magnetic field at that point. B, 2 What is the magnetic field strength at points 2, 3, and 4? mT. At point 4: B- ml mT. At point 3: B At point 2: B

Explanation / Answer

1.

Particle 1 :

using right hand rule , particle 1 comes out to be negative

Particle 2 :

using right hand rule , particle 2 comes out to be neutral.

Particle 3 :

using right hand rule , particle 3 comes out to be positive.

2.

As the magnetic moves towards the coil, the magnetic flux linked with the coil increase. the coil induces current in itself so as to decrease the magnetic flux by having its own magnetic field in opposite direction of the magnetic field by the magnet. the coil has induced current so as to produce magnetic field in upward direction. this suggest that the magnetic field by the magnet was in downward direction.

hence end X of the magnet is south and end Y is north

so correct choice is "a"

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