Magnetic Induction Problem

[Jacob87411]

An apparatus has two batteries in a row (negative-positive negative-positive is how the batteries go..the negative part is above the positive one in two consecutive batteries.). There is a switch after the two batteries, the wire holding the batteries is conected to conducting rails on both sides and on the rails is a conducting bar free to slide. The question is what happens when the switch closes.

I figure when the switch closes it makes a complete circuit, the current can keep flowing through the rails and the bar. The bar i believe will move but unsure in what direction. Would like some clarification to confirm that this is what will indeed happen.

 

[DeepThought]

Figure out the direction of the current that flows through these two rails...
and then use the right hand rule

 

[thepatientmental]

When the switch is closed, the two batteries will create a magnetic field in the conducting rails due to the flow of current. This magnetic field will interact with the magnetic field of the conducting bar, causing it to move in a certain direction. The direction of the movement will depend on the direction of the current flow and the orientation of the magnetic fields.

If the current flows in the same direction in both batteries, the magnetic fields will repel each other, causing the conducting bar to move away from the batteries. If the current flows in opposite directions, the magnetic fields will attract each other, causing the conducting bar to move towards the batteries.

The direction of the current flow can be determined by the orientation of the batteries (negative-positive-negative-positive). If the switch is flipped to reverse the direction of the current, the direction of the movement of the conducting bar will also be reversed.

Overall, when the switch is closed, the conducting bar will move in a direction determined by the interaction of the magnetic fields created by the batteries and the conducting bar.