A Wire of Resistivity ρ Must Be Replaced in a Circuit

question 48

Multiple Choice

A wire of resistivity ρ must be replaced in a circuit by a wire of the same material but 4 times as long.If,however,the resistance of the new wire is to be the same as the resistance of the original wire,the diameter of the new wire must be

• A) the same as the diameter of the original wire.
• B) 1/2 the diameter of the original wire.
• C) 1/4 the diameter of the original wire.
• D) 2 times the diameter of the original wire.
• E) 4 times the diameter of the original wire.

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Definitions:

Axillary

Pertains to the area under the arm, where the upper limb attaches to the shoulder.

Orally

Pertaining to the mouth; taken through or affecting the mouth, as in oral medication.

NICU

An intensive care unit specializing in the care of ill or premature newborn infants.

Heart Rate

The number of heartbeats per unit of time, typically measured in beats per minute (bpm).