A Microwave Oven Operates with Sinusoidal Microwaves at a Frequency

question 20

Multiple Choice

A microwave oven operates with sinusoidal microwaves at a frequency of 2400 MHz.The height of the oven cavity is 25 cm and the base measures 30 cm by 30 cm.Assume that microwave energy is generated uniformly on the upper surface of the cavity and propagates directly downward toward the base.The base is lined with a material that completely absorbs microwave energy.The total microwave energy content of the cavity is 0.50 µJ.What is the intensity of the microwave beam? (c = 3.00 × 10⁸ m/s,μ₀ = 4π × 10^-7 T ∙ m/A, ε₀ = 8.85 × 10^-12 C²/N ∙ m²)

• A)5.2 kW/m²
• B)5.7 kW/m²
• C)6.2 kW/m²
• D)6.7 kW/m²
• E)7.2 kW/m²

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Definitions:

Agency Law

A legal doctrine focusing on the relationship between a principal and their agent, including the rights and duties that arise.

Conflicting Duties

Situations where an individual or entity has responsibilities that are at odds with each other, making it difficult to fulfill both.

Apparent Authority

Apparent authority refers to a situation where a reasonable person would understand that an agent has the authority to act on behalf of a principal, even if the agent does not have actual authority.

Business Expenses

Costs incurred in the operation of a business, which are typically deductible from the business income for tax purposes.