P2a - Collecting Energy from the Sun 0.0 / 5 ? PhysicsEnergyGCSEOCR Created by: natalie27Created on: 28-03-14 18:12 What is a photocell? A solar cell with a flat surface that captures as much light energy from the Sun as possible. 1 of 5 What does a photocell do? Transfers light energy into an electric current that travels in the same direction all the time (DC). 2 of 5 How do photocells work? Sun's energy causes electrons in photocell to be knocked loose from silicon crystals - flow freely as an electric current. 3 of 5 What does the power of a photocell depend on? Surface area exposed to light, distance from the light source and the intensity of that source. 4 of 5 How would you maximise power output? An efficient solar panel must track (follow) the Sun in the sky. 5 of 5
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