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# Two very long conductors (both oriented in the same plane) are shown in the sketch below. The same magnitude of conventional current in each is...

1.

Two very long conductors (both oriented in the same plane) are shown in the sketch below. The same magnitude of conventional current in each is represented by the red arrows. The black dot is at a position (in the same plane) equidistant between the conductors. Determine the direction of the magnetic field at the position of the black dot.

a. There is no magnetic field at this position.

b. The magnetic field is oriented out of the page.

c. The magnetic field is oriented into the page.

d. The magnetic field is oriented to the left.

e. The magnetic field is oriented to the right.

2.

If the black dot in the previous sketch represented an electron with an instantaneous velocity toward the bottom of the page, in which direction is the magnetic force on the electron at that moment?

a. There is no magnetic force at that moment.

b. The magnetic force acts to the left at that moment.

c. The magnetic force acts to the right at that moment.

d. The magnetic force acts upward at that moment.

e. The magnetic force acts downward at that moment.

3.

Both conducting loops shown below are coplanar (in the y/z axes) and carry current as shown. They are separated by some arbitrary distance. Will they attract or repel each other?

a. They will attract each other.

b. They will repel each other.

c. They will not exert a force on each other.

d. They will attract each other and then repel each other as an oscillator.

1) c. The magnetic field is oriented into the page.... View the full answer

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