What Is the Average Value of the Magnitude of the Poynting

question 6

Multiple Choice

What is the average value of the magnitude of the Poynting vector at 1 metre from a 100-watt light bulb radiating in all directions?

• A)1 W/m2
• B)4 W/m2
• C)2 W/m2
• D)8 W/m2
• E)12 W/m2

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Definitions:

Margin of Safety

This is a financial metric that measures the difference between actual sales and the break-even point, indicating how much sales can decline before a business incurs a loss.

Percentage of Sales

A financial ratio that compares a particular figure or amount to the total sales of a company.

Dollars

The official currency of the United States, also used as a standard monetary unit in many other countries and economic contexts.

Break-Even

The point at which total costs equal total revenue, indicating that a business is neither making a profit nor a loss.