The Figure Shows a Bar Magnet Moving Vertically Upward Toward

question 11

Multiple Choice

The figure shows a bar magnet moving vertically upward toward a horizontal coil.The poles of the bar magnets are labeled X and Y.As the bar magnet approaches the coil it induces an electric current in the direction indicated on the figure (counter-clockwise as viewed from above) .What are the correct polarities of the magnet?

• A)X is a south pole,Y is a north pole.
• B)X is a north pole,Y is a south pole.
• C)Both X and Y are north poles.
• D)Both X and Y are south poles.
• E)The polarities of the magnet cannot be determined from the information given.

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Definitions:

Pacinian

Referring to Pacinian corpuscles, pressure-sensitive mechanoreceptors that respond to deep, transient pressure and vibration.

Ruffini Corpuscles

Sensory receptors located in the skin that detect stretch, pressure, and warmth, playing a role in the sensation of touch and control of finger position.

Merkel Cells

Specialized cells found in the skin that are involved in the sense of touch, particularly in detecting pressure and texture.

Receptive Field

The specific area within the visual world that elicits a response from any sensory neuron.