The Electron Density in Copper Is 8

question 31

Multiple Choice

The electron density in copper is 8.49 *1028 electrons/m3.The electron charge is e = -1.60 *10-19 C.When a 1.00 A current is present in a copper wire with a 0.40 cm2 cross-section, the electron drift velocity, in m/s, with direction defined relative to the current density, is:

• A)(-1.84 *10-6.)
• B)+1.84 * 10-6.
• C)(-1.84.)
• D)(-5.43 * 105.)
• E)+5.43 * 105.

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Definitions:

LIFO Method

"Last In, First Out," an inventory valuation method where the most recently purchased items are the first to be sold, affecting the cost of goods sold and inventory valuation.

FIFO Method

"First In, First Out," an accounting method for valuing inventory, where the earliest items acquired are the first to be sold.

Inventory Valuation

The method used to assess the cost or market value of inventories held by a business for the purpose of financial reporting.

Interim Financial Reporting

Reporting of a company's financial performance and position for a period shorter than its fiscal year, often quarterly.