From 435292ba1391cc1beda2546c50b0c4dcacc9011d Mon Sep 17 00:00:00 2001 From: tactonbishop Date: Thu, 25 Aug 2022 08:00:04 +0100 Subject: [PATCH] Last Sync: 2022-08-25 08:00:04 --- Electronics/Cells_and_batteries.md | 7 +++++++ Electronics/Physics_of_electricity/Voltage.md | 8 +++----- 2 files changed, 10 insertions(+), 5 deletions(-) diff --git a/Electronics/Cells_and_batteries.md b/Electronics/Cells_and_batteries.md index e69de29..1651db0 100644 --- a/Electronics/Cells_and_batteries.md +++ b/Electronics/Cells_and_batteries.md @@ -0,0 +1,7 @@ +--- +categories: + - Electronics +tags: [physics, electricity] +--- + +# Cells and batteries diff --git a/Electronics/Physics_of_electricity/Voltage.md b/Electronics/Physics_of_electricity/Voltage.md index 9384eaf..2e83e9b 100644 --- a/Electronics/Physics_of_electricity/Voltage.md +++ b/Electronics/Physics_of_electricity/Voltage.md @@ -37,8 +37,6 @@ Magnetism is used the voltage source in electrical generators by far the most co If a conductive wire is passed through a magnetic field voltage will be produced so long as there is motion between the magnetic field and the conductor. A **generator** is a device that generates current in this manner. Generators themselves need to be powered. They can be powered by steam from a nuclear power plant, water, wind, coal or other fossil fuels. -// TODO: Add symbol - #### AC/DC Depending on how it is wired, a generator can produce **directed current** (DC) or **alternating current** (AC): @@ -56,8 +54,8 @@ The chemical creation of current is the physics behind batteries. Chemical curre A chemical cell consists in two dissimilar metals such as copper and zinc. We call these the **electrodes**. They are immersed in a salt, acid or alkaline solution. We call these the **electrolytes**. The electrolyte pulls the free electrons from the copper electrode which leaves it imbalanced with a positive charge. The zinc electrode attracts the free electrons from the electrolyte giving it a negative charge, thus a difference of potential is achieved. -// TODO: Add symbol - ### Light (photovoltaic cells) -// TODO: Add symbol +Solar energy can be converted to electrical energy through solar panels which are large collections of **photovoltaic cells**. + +When the surfaces of these cells are exposed to light, it dislodges electrons from their orbits around the surface atoms of the cell material. For each cell this only produces a very small amount of energy, therefore large quantities must be used.