Grade 8 Natural Sciences (NS) Summaries - Term 3 (Via Afrika): These summaries are compiled using the Via Afrika textbook's Term 3 content. The summaries are in English, with additional notes provided by the compiler.
Strand 3 - Energy and change
Topic 1: Static electricity
Topic 2: Ener...
, Parallel Circuits Series circuits
A circuit with two or A circuit with only one
more pathways for pathway for charges
• Parallelcharges
circuits are when two lines or resistors are connected • Circuits with one charge pathway.
in parallel. • Components connected one after another.
• The overall current in a parallel circuit increases when more • Positive terminal of one cell touches negative of the
resistors are added. next.
• • Current remains constant.
• Addition of resistor decreases overall circuit current.
Comparing Resistors in
Series and Parallel T3: Series and
Sample
• Circuit Design:
o Features a torch cell holder and metal pegs for easy
strip fitting.
o Strips connect circuit components and some have
holes for screwing torch bulbs.
parallel
circuits
A Circuit Board
• Torch Cell Holder Overview:
o Features holder for torch cells.
o Arranges metal pegs for easy strip fitting.
o Connects circuit components.
Summaries after sample
o Maximum of three torch cells can be placed in series. o Some strips have bulb screw holes.
o Connecting wire with crocodile clips connects cells to o Can hold up to three torch cells in series.
the circuit. o Connects cells to circuit via crocodile clips.
o Series circuit provides one pathway for current
passing.
o Series resistors increase total resistance, decreasing
current.
o Parallel circuit provides two or more pathways for
current passing. The history of
• Bulbs in Series and Parallel Circuits Other Output Devices electricity
o Advantages: One switch can switch on all bulbs.
o Disadvantages: If one bulb burns out, all bulbs go out. • Other output devices include • Evidence suggests that
o Advantages: As more bulbs are connected, total buzzers and beepers used in alarm electricity has been used by
current produced increases, reducing battery lifespan. systems, relays for powerful ancient Egyptians over 3,000
• Metal Resistors electric motors, fluorescent tubes, years ago.
o Nickel and chromium wire used in toasters and hair and LED lighting.
dryers.
o Eureka wire used for cutting polystyrene when hot.
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through EFT, credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying this summary from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller SummariesSA. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy this summary for R100,00. You're not tied to anything after your purchase.
