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:

Budget Variance

The difference between budgeted figures and actual figures for a particular accounting category.

Volume Variance

The difference between the expected and actual sales volumes, impacting revenue and expenses.

Manufacturing Overhead

All indirect costs associated with manufacturing a product, such as factory maintenance, utilities, and quality control.

DLH

The hours of work performed by workers directly involved in the manufacturing process, serving as a basis for allocating labor costs.