Two very long, straight wires carry currents as shown in the figure ( Figure 1 )

Question

Two very long, straight wires carry currents as shown in the figure (Figure 1) .Figure 1 of 1

Part A

Part A

For the case (a) shown, find all locations where the net magnetic field due to these wires is zero. Assume if you want to draw a line it would be enough to specify only two points.

Draw and label graph

Part B

For the case (b) shown, find all locations where the net magnetic field due to these wires is zero. Assume if you want to draw a line it would be enough to specify only two points.

draw and label graph

Part C

For the case (c) shown, find all locations where the net magnetic field due to these wires is zero. Assume if you want to draw a line it would be enough to specify only two points.

draw and label graph

Explanation / Answer

part a)

net magnetic field is not zero at any of the point,because direction of magnetic field at any point due to both wires is same

part b)

net magnetic field will be zero at the points which are near to 3 wire, but far from 10 wire

because magnetic field due to these wires are in opposite direction

so net magnetic field will be zero where there magnitudes are equal

such that

B1=B2

part c)

magnetic field due to these wires are in opposite direction,and they have same current, so it will be zero when

B1=B2

that when they are at equal diatnce

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