# The two insulated, current-carrying wires in Figure P28.7 cross at right angles, and each carries a current

## Question:

The two insulated, current-carrying wires in Figure P28.7 cross at right angles, and each carries a current \(I\). The locations labeled 1-4 are all in the plane defined by the wires, with each location a perpendicular distance \(d\) from both wires. At how many of these four locations is the magnetic field

**(a)** directed out of the page,

**(b)** directed into the page, and

**(c)** equal to zero?

**Data from Figure P28.7**

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