In the circuit shown, when the switch is suddenly closed, the wire L is pulled toward the lower wire carrying current I. a) Which (? or ?) is the positive pole of the battery? Briefly explain. b) Draw i. the direction of the magnetic field due to the lower wire carrying current I at the location of the wire L and ii. the direction of the magnetic force on the wire L.

In the circuit shown, when the switch is suddenly closed, the wire L is pulled toward the lower wire carrying current I. a) Which (? or ?) is the positive pole of the battery? Briefly explain. b) Draw i. the direction of the magnetic field due to the lower wire carrying current I at the location of the wire L and ii. the direction of the magnetic force on the wire L.

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