A Conducting Sphere Has Charge Q and Its Electric Potential

question 19

Multiple Choice

A conducting sphere has charge Q and its electric potential is V, relative to the potential far away.If the charge is doubled to 2Q, the potential is:

• A)V
• B)2V
• C)4V
• D)V/2
• E)V/4

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Definitions:

Na+ Channels

Protein pores in the membranes of cells that allow the passage of sodium ions (Na+) into or out of the cell, crucial for the initiation and propagation of electrical signals in neurons and muscle cells.

Ca2+ Channels

Protein channels in cell membranes that allow the movement of calcium ions (Ca2+) into or out of a cell, playing critical roles in cellular functions.

Na+ Channels

Specialized proteins in cell membranes that allow sodium ions to enter or leave a cell, playing a key role in generating electrical signals.

SA Node

The sinoatrial node, a group of cells located in the right atrium of the heart that initiates the electrical impulses governing the heart rate, often considered the heart's natural pacemaker.