Interview
Electricity
- Course
- Institution
Electricity exam notes for iGCSE
[Show more]
Seller
Follow
elsamompoalbiana
Content preview
define electricityflow of energy or charge between charged particles either statically or in a circuit.
units of measuring electricity
UNIT MEASURES UNIT MEASURES UNIT MEASURES
Volts (V) voltage Coulomb (C) charge Joule (J) energy
Amps (A) current Second (S) time
Ohm (Ω) resistance (slows down flow) Watt (W) power
mains electricity from a battery / power supply.
DIRECT CURRENT ALTERNATING CURRENT
Electric current that always flows in one direction Electric current that is constantly changing direction.
(produced by cells and batteries)
-Circuits (e.g. in computers) need d.c. electricity in -produced by most generators and is used in mains
order to work. electricity.
-cannot be transferred efficiently over large distances. -can be transferred efficiently over large distances.
electrical safety
insulators job double insulation how fuses+circuit breakers protect circuits
material that doesn’t -electrical appliance with 2 -prevent overloads that can cause fire
let heat / electricity insulations: -quickly interrupt flow of fire
travel through easily (basic + supplementary) -when they melt: need replacement / reset.
-protection against shock
FUSE CIRCUIT BREAKER
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
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 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 these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller elsamompoalbiana. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.22. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
82871 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now