1.Take a wire and close it in a loop. Place the loop on the table in front of yo
ID: 1444129 • Letter: 1
Question
1.Take a wire and close it in a loop. Place the loop on the table in front of you and imagine current flowing around the loop in a counterclockwise direction when viewed from above. For points outside the loop, the magnetic field caused by this current has field lines that are
circumferences concentric with the loop in a clockwise direction.
circumferences concentric with the loop in a counterclockwise direction.
pointing straight up.
pointing straight down.
zero.
2.In your kitchen, an appliance has a perfect horizontal wire that carries a DC current straight toward you. From your point of view, the magnetic field at a point directly below the wire points
directly away from you.
to the left.
to the right.
directly toward you.
vertically upward
circumferences concentric with the loop in a clockwise direction.
circumferences concentric with the loop in a counterclockwise direction.
pointing straight up.
pointing straight down.
zero.
2.In your kitchen, an appliance has a perfect horizontal wire that carries a DC current straight toward you. From your point of view, the magnetic field at a point directly below the wire points
directly away from you.
to the left.
to the right.
directly toward you.
vertically upward
Explanation / Answer
1) From RHR, The magnetic field due to counterclockwise current in the loop will be pointing straight up.
2) From RHR, The magnetic field at lower points due to straight current towards me will be to the right.
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