A Horizontal Rod (Oriented in the East-West Direction) Is Moved

question 27

Multiple Choice

A horizontal rod (oriented in the east-west direction) is moved northward at constant velocity through a magnetic field that points straight down. Make a statement concerning the potential induced across the rod.

• A)The west end of the rod is at higher potential than the east end.
• B)The east end of the rod is at higher potential than the west end.
• C)The top surface of the rod is at higher potential than the bottom surface.
• D)The bottom surface of the rod is at higher potential than the top surface.
• E)The potential is uniform across the rod.

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Definitions:

Depolarizing Currents

Electrical currents that reduce the membrane potential of neurons, making the inside less negative and closer to the threshold for firing an action potential.

Action Potentials

short-lasting events in which the electrical membrane potential of a cell rapidly rises and falls, allowing neurons to transmit signals.

Synaptic Gaps

The small spaces between neurons across which neurotransmitters travel to transmit signals from one neuron to another.

Neurotransmitters

Chemicals released by one neuron (usually the presynaptic neuron), which trigger a response in another neuron (usually the postsynaptic neuron); the chief means of communication among neurons.