The magnitude of the magnetic field produced by a long straight wire is proporti

Question

The magnitude of the magnetic field produced by a long straight wire is proportional to the current passing through the wire and inversely proportional to the distance from the wire. Consider the five pairs of long parallel wires shown below. The arrows indicate the direction of the current in each wire, with small arrows representing a current of 5 A and large arrows representing a current of 7 A. For each pair, determine in which one of the following regions the net magnetic field is zero someplace: A on the left of both wires B between the two wires C on the right of both wires D none of the above (i.e. nowhere) Do not consider distances very far from the wires since in this case the magnetic field always goes to zero.

Explanation / Answer

for the first figure

on the right of both the wires

Second figure includes two figures

for the top figure

A) on the left of both wires

for bottom figure

B) between the two wires

third figure

B) between the two wires

Fourth figure

A) on the left of the both wires
C) on the right of both wires

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