What Happens to the Bar Magnet When the Switch is Closed?

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When the switch is closed, the current flowing through the coil generates a magnetic field that interacts with the bar magnet. The direction of the magnetic field is crucial, as it determines whether the magnet is attracted or repelled. If the current flows downward, it creates a specific magnetic orientation that can attract the magnet's N pole. Understanding the magnetic field lines is essential for predicting the magnet's movement. The discussion emphasizes the importance of analyzing the magnetic field direction to determine the resulting force on the bar magnet.
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Q: A coil is connected to a battery as shown in the figure and a bar magnet is suspended with its N pole just above the center of the coil.


What will happen to the bar magnet just after the switch S is closed?



20-0.jpg




Answer choices:
It will be pulled toward the coil.
It will be pushed away from the coil.
It will be pushed out of the paper.
It will be pushed into the paper.


My guess:
I think that when the switch is closed the current makes the coil change the mag. field and will attract the magnet..?
:((
 
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Does it matter that the current through the coil flows downward?
 
Try to draw the magnetic field lines generated due to the current. How will they affect the magnet?
 
I'm not sure of the direction of the force in the coil.
 

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