Three Charges Are Brought from Infinity and Placed at the Corner

question 59

Multiple Choice

Three charges are brought from infinity and placed at the corner of an equilateral triangle.Which of the following statements is true?

• A)The work required to assemble the charges is always positive.
• B)The electrostatic potential energy of the system is always positive.
• C)The electrostatic potential energy does not depend on the order the charges are placed at the corners.
• D)The work required to assemble the charges depends on which charge is placed at which corner.
• E)The electrostatic potential energy depends on which charge is placed at which corner.

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Definitions:

Reabsorption

The process by which substances are taken back into the bloodstream from the filtrate produced by the kidneys or other filtering mechanisms.

Podocytes

Specialized cells in the kidney that wrap around capillaries of the glomerulus, playing a key role in the filtration of blood to form urine.

Ascending Limb

Part of the loop of Henle in the nephron of the kidney, which helps concentrate urine by allowing the reabsorption of water and salts.

Descending Limb

A portion of the loop of Henle in the nephron of the kidney, which is involved in the reabsorption of water back into the body.