Reflection on Microwave Oven Efficiency
How does the efficiency of a microwave oven affect the power drawn from the source?
Given that a microwave oven running at 60% efficiency delivers 900 W of energy per second to the interior, what is the power drawn from the source?
Answer:
The efficiency of a microwave oven affects the power drawn from the source by determining how much of the input power is actually delivered to the interior for cooking. In this case, with a 60% efficiency, only 60% of the original power drawn from the source is utilized for cooking, with the remaining 40% being dissipated as waste heat.
When a microwave oven runs at 60% efficiency and delivers 900 W of energy per second to the interior for cooking, we can calculate the power drawn from the source using the efficiency formula.
The formula for efficiency is:
Efficiency = (Useful power output) / (Total power input)
Given that the microwave oven delivers 900 W of power to the interior and has an efficiency of 60%, we can rearrange the formula to find the total power drawn from the source:
Total power input = (Power output) / Efficiency = 900 W / 0.60 = 1500 W
Therefore, the power drawn from the source to operate the microwave oven is 1500 W. This means that the source needs to provide 1500 watts of power in order for the microwave oven to deliver 900 watts of cooking power at 60% efficiency.