Building Codes Usually Limit the Current Carried by a No

question 2

Multiple Choice

Building codes usually limit the current carried by a No.14 copper wire to 15 A.Many household circuits are wired with this size wire.What is the drift velocity of the electrons in this case? The diameter of this wire is 1.6 mm.Assume one conduction electron per atom in copper.The atomic weight of copper is 63.3 g/mol and its density is 8900 kg/m³.Avogadro's number is 6.022 × 10²³ molecules/mol and .

• A) 5.51 × 10^-4 m/s
• B) 4.56 × 10^-4 m/s
• C) 1.65 × 10^-3 m/s
• D) 4.44 × 10^-2 m/s
• E) 4.89 × 10^-5 m/s

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Definitions:

Imported Wine

Wine brought into a country from another country for sale and consumption.

Quantity Imported

The total number of goods or services brought into a country from abroad for sale.

Import Quotas

Restrictions set by the government on the amount or monetary value of products allowed to be imported into a nation.

Tariffs

Taxes imposed by a government on imported goods, often used to protect domestic industries and to generate revenue.