A Microwave Oven Operates with Sinusoidal Microwaves at a Frequency

question 32

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 amplitude of the electric field? (c = 3.00 × 10⁸ m/s,μ₀ = 4π × 10^-7 T ∙ m/A, ε₀ = 8.85 × 10^-12 C²/N ∙ m²)

• A)1600 V/m
• B)1900 V/m
• C)2200 V/m
• D)2500 V/m
• E)2800 V/m

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Definitions:

Hypothesized Population Mean

The expected value of the mean for a population, as proposed in a hypothesis, that is tested for accuracy against sample data.

T-statistic

A ratio of the departure of the estimated value of a parameter from its hypothesized value to its standard error, used in hypothesis testing.

Sample Mean

The average value of all observations in a sample.

Alternative Hypothesis

A statement that suggests there is a statistically significant relationship between two variables, contrasting the null hypothesis.