The Figure Shows Two Long,parallel Current-Carrying Wires

question 52

Multiple Choice

The figure shows two long,parallel current-carrying wires.The wires carry equal currents A in the directions indicated and are located a distance d = 0.5 m apart.Calculate the magnitude and direction of the magnetic field at the point P that is located an equal distance d from each wire.

• A) 8 µT downward
• B) 8 µT upward
• C) 4 µT downward
• D) 4 µT upward
• E) 4 µT to the right

---

Definitions:

Refractory Period

The period immediately following the transmission of a nerve impulse or the contraction of a muscle during which a nerve or muscle is unresponsive to further stimulation.

Threshold

The point or level at which something begins or changes.

Dendrites

The branched extensions of a neuron that receive signals from other neurons.

Insulate Neurons

The process of covering neurons with myelin, a fatty substance that speeds up the transmission of electrical signals along nerve cells.