Electricity 2: Circuits Flashcards
What is a circuit?
A circuit is a complete path around which electricity (electrons) can flow. It must include a source of electricity, such as a battery.
Why do we use circuit diagrams?
We draw circuit diagrams to show how different components are connected in a circuit.
Why do we use circuit symbols?
Circuit symbols are used so that common components can be recognised by scientists all over the world.
You will need to know how too draw different symbols. How would you draw a symbol for an ammeter?
This would be a circle with an A inside
You will need to know how too draw different symbols. How would you draw a symbol a lamp?
This would be a symbol with a large x in it.
Define ‘Series Circuit’
A series circuit is one that is connected in one single loop. There is only one path for the current to take.
What happens when you add a bulb to a series circuit?
When you add extra bulbs to a series circuit all of the bulbs get dimmer.
What happens when you remove a bulb from a series circuit?
When you unscrew a bulb in a series circuit the other one also goes out.
What is an advantage of a series circuit?
When components are connected in series, they can all be turned on and off at the same time.
What is a disadvantage of a series circuit?
When components are connected in series and one breaks, they will all stop working.
Describe a parallel circuit
A parallel circuit is one that has ‘branches’. There is more than one path for the current to take.
When two lamps are in parallel what happens when one lamp is unscrewed?
When you unscrew 1 bulb the others stay lit.
What happens when you add extra bulbs to a parallel circuit?
When you add another bulb the brightness doesn’t change.
What is an advantage of using a parallel circuit?
An advantage of using parallel circuits is that if one component breaks, the others continue to work. You can also add extra bulbs without the brightness being affected.
What is a disadvantage of using a parallel circuit?
A disadvantage of using parallel circuits is that they are more confusing to build.
