Unit 15 - Electrical Circuits and their Application
Institution
PEARSON (PEARSON)
This is the third assignment required for unit 15 Electrical Circuits BTEC applied science. This assignment was awarded a distinction grade and it covers all the key aspects of the specification. Please do not copy use as a guide only, good luck!
Unit 15 - Electrical Circuits and their Application
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Section 1 Commons.wikimedia.or
A cell is composed of one single power source. g. 2022. File: A Cell and
a Battery symbol’s -
A battery is composed of multiple connections of cells that Wikimedia Commons.
are arranged in series. [online] Available at:
They are categorised into primary which are non- https://commons.wikim
rechargeable such as regular batteries in toys or watches edia.org/wiki/File:A_Cel
and secondary cells which are rechargeable meaning that l_and_a_Battery_symbo
chemical produced to provide the electricity can be reversed. Secondary cells can l.svg [Accessed 3 March
be found in phones or laptops. 2022].
Primary non rechargeable cells can be made of zinc-carbon which are standard cells but have short
life, so they needs to be replaced or alkaline cells which have a longer life.
Secondary rechargeable cells are made of lithium ion which are made from simple lithium, but the
Andrew R. 2022, primary and
ions are the parts that provides electricity.
secondary cells. Accessed: 01/03/22
Secondary rechargeable cells can also be made of lead-acid which
are often used as batteries for cars because it turns a lower input voltage to a higher output voltage.
Advantages of primary cells include that they are cheaper to buy compared to secondary cells which
are more expensive. Also has a higher voltage where the secondary cells only has the voltage that
stays constant. However, a disadvantage of primary cells is that it is economical to use because it
requires lots of energy to put in compared to what energy is given out, secondary cells are
nonstandard and so they are non-transferrable.
Torchspot.com. 2022. Flashlight
Batteries Explained. [image]
Available at:
https://www.torchspot.com/ulti
mate-guide-flashlight-batteries/
[Accessed 8 March 2022].
Lithium primary cells have a longer life, so they last for a longer period of time than secondary
alkaline cells that has a small capacity or larger capacity. This is because the Li primary cells provide a
voltage that it is more consistent which alkaline cells cannot do.
Direct current:
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