1. The conducting loop in the figure is moving into the region between the magnetic poles shown.
Is the induced current (viewed from above) clockwise or counterclockwise?
A. clockwise
B. counterclockwise
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The concepts required to solve this problem are force on charge in magnetic field, and Lenz’s law.
Initially find the direction of force on charge carriers in the bar due to magnetic field by using right hand rule to find the direction of induced current. Finally use Lenz’s law to identify the correct statement for force.
The right-hand thumb rule gives the direction of force on a charge particle. If the fingers curl from the direction of velocity to the direction of magnetic field, then the thumb points in the direction of the force exerted on the magnetic field.
Lenz’s law stats that the emf induced in a conducting material by changing magnetic flux will create a magnetic field exactly opposite to the change in the applied magnetic flux.
(1)
The magnetic field points from North to south pole that is in the upward direction and the bar is moving to the left. The fingers curl from left direction to upwards. The thumb points in into the plane of the page. So, the direction of force is into the plane. Thus, induced current is clockwise as viewed from above.
(2)
The force is required to keep the rod moving as from the Lenz’s law, the current is induced to oppose the change in magnetic flux. There is no attractive force from the magnet. The induced current in the rod results in a repulsive force in the magnetic field. Thus, you need to push the loop in against a repulsive force.
Ans: Part 1The induced current in the circuit is in clockwise direction.
Part 2You need to push the loop in against a repulsive force.
1. The conducting loop in the figure is moving into the region between the magnetic poles...
Consider a conducting loop placed on a horizontal plane in a region of uniform magnetic field directed downward. If the magnitude of the magnetic field begins to decrease, what will the direction of the induced current in the loop be? Select one: a. Clockwise, so that the magnetic field of the loop is upward b. Clockwise, so that the magnetic field of the loop is downward c. Counterclockwise, so that the magnetic field of the loop is upward d. Counterclockwise,...
Conceptual: A conducting loop of wire is oriented horizontally, and a magnet is falling downward, through the loop. (a) Draw the direction of the induced current that flows in the loop as the magnet falls downward. (b) Sketch and label the magnetic field lines that are created by the induced current in the loop. (c) Does this create an attractive or repulsive force between the loop and magnet?
1) Parts A-E refer to the following figure of a circular loop of conducting wire. In the figure, Region I has a uniform magnetic field in the direction shown and Region II has no magnetic field. a) If the loop moves to the right and starts to move into Region II, what is the direction of the induced current in the wire? Circle the correct response. a) Clockwise. b) Counterclockwise. c) There is no induced current. b) If the loop moves straight down and remains...
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1) Which of Maxwell's equations below predicts an induced magnetic field due to changes in an electric field? A) #Edi = 9 B) B. dA= 0 D$B.ds = Hole + Hope E) All of them 2) In the figure, two parallel wires carry currents of magnitude / as shown. The current is decreasing with time. A rectangular loon is midway between the wires. What is the direction of the net magnetic field in the region between the wires and that...
B A loop is moving from a region with no magnetic field to a region with a magnetic field pointing out of the page as shown above. Which direction is the induced current in the loop: clockwise or counter-clockwise? Answer:
In the figure, a region with
constant (externally produced) magnetic field is shown. A wire loop
moves into the magnetic field.
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Which of the following is correct? While the loop is moving into
the region with the constant external magnetic field, the magnetic
field inside the loop due to the induced current in the loop points
...
No magnetic field is induced by the movement of the loop.
... down
... left
... into the page
... right
......
a. Consider a circular conducting loop that is moved at a constant speed from right to left through a rectangular region with uniform magnetic field B, as shown in the figure. As the loop moves from position 3 to position 4, a clockwise current is induced in the loop. b. a counterclockwise current is x x induced in the loop. an into the page current is 5 1 induced in the loop. d. an out of the page current is...
Consider a circular conducting loop that is moved at a constant speed from right to left through a rectangular region with uniform magnetic field B, as shown in the figure. As the loop moves from position 1 to position 2, a. a clockwise current is induced in the loop. b. a counterclockwise current is induced in the loop. * * * * * c. an into the page current is 5 3 1 induced in the loop. d. an out...
The figure below pertains to questions 10.) and 11.). It
illustrates a 15cm long conducting bar resting on zero-resistance
wires. You begin exerting a force on the bar and thereby make it
move at constant speed. While the bar is moving, a counterclockwise
induced current is present in the conducting loop created by the
bar and wires.10.) Which of the following statements is false?a.) You are moving the conducting bar to the right.b.) The induced magnetic field through the center of...