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Answer :
Final answer:
To find the sunlight power input on a solar panel that produces 0.80 W with a 20% efficiency, we use the formula Output Power = Efficiency × Input Power, resulting in an input power of 4.0 W.
Explanation:
The question asks: A solar panel is used to recharge a battery. The solar panel produces 0.80 W of electrical power. The panel is 20% efficient. What is the power input of the sunlight onto the solar panel? To find the power input of sunlight onto the solar panel, we'll use the formula that relates the output power, efficiency, and input power. The formula is Output Power = Efficiency × Input Power. In this case, the output power is 0.80 W, and the efficiency is 20%, or 0.20 in decimal form.
Substituting the given values into the formula, we get 0.80 W = 0.20 × Input Power. To solve for the input power, we divide both sides by the efficiency (0.20), which gives us Input Power = 0.80 W / 0.20 = 4.0 W. Therefore, the power input of the sunlight onto the solar panel is 4.0 W.
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Rewritten by : Barada
Given a solar panel's output of 0.80 W and efficiency of 20%, the input power from the sunlight is calculated to be B) 4.0 W.
To determine the power input of the sunlight onto the solar panel, we need to take into account its efficiency. The given information states that the solar panel produces 0.80 W of electrical power and operates at 20% efficiency. We can use this efficiency to find the total power input of sunlight.
- Efficiency formula: Efficiency = (Output Power / Input Power) × 100%
- Rearrange the formula to find the Input Power: Input Power = Output Power / Efficiency
- Substitute the given values:
Input Power = 0.80 W / 0.20 - Calculate the Input Power:
Input Power = 4.0 W
Therefore, the power input of the sunlight onto the solar panel is B) 4.0 W.
