A Microwave Oven Operates with Sinusoidal Microwaves at a Frequency

question 2

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, ,

• 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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