you are using your calculator in a room illuminated by a 120 w bulb 2.8 m away. assume the light bult is designed to send the light uniformly into a hemisphere. the solar cells have an active area of 3 cm2. if the solar cells are 15% efficient, how much electrical power is the calculator receiving in mw?

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01-12-2022
Physics

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you are using your calculator in a room illuminated by a 120 w bulb 2.8 m away. assume the light bult is designed to send the light uniformly into a hemisphere. the solar cells have an active area of 3 cm2. if the solar cells are 15% efficient, how much electrical power is the calculator receiving in mw?

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Edwardgk12idn Edwardgk12idn · Answer 1 · 2022-12-05T11:24:12-05:00

If the solar cells are 15% efficient, the electrical power that the calculator is receiving is 0.10962mW.

What is solar cells?

A solar cell, or photovoltaic cell, is an electronic device that converts the energy of light directly into electricity by the photovoltaic effect, which is a physical and chemical phenomenon.

How to calculate the electrical power that the calculator will receive?

P = 120W

r = 2.8m

A = 3cm² = 3 * 10^-4 m²

Intensity = 15/100 * P/4*π*r^2

= 0.15 * 120 / 0.5 * 4π * 2.8²

I = 0.3654 W/m^2 (rounded)

Received power = I * A

= 0.3654 * 3 * 10^-4

= 1.0962 * 10^-4 W

= 0.10962 mW

Learn more about solar cells https://brainly.com/question/29553206

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What is solar cells?

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