Physics module Flashcards
What is the only way that electrical current will flow
If the circuit is complete
What is in a series circuit
Only one path for the current
What happens as more bulbs are added
Each becomes dimmer
What happens if one component fails
The whole circuit fails
What is in a parallel circuit
There is more that one path for the current to follow
What happens as more light bulbs are added
All remain bright
What happens when one component fails
The rest of the circuit continues
What are conductors
Conductors are substances which electric current can flow through easily
What are some examples of conductors.
Steel, copper brass
What are insulators
Substances which stop electric current flowing
What is some examples of instulatore
Plastic, wood rubber
What is electrical current
The movement for electric charge from negative to positive in a circuit
What symbol is electrical current given
I
What is electrical current measured in
Amperes or A
Voltage is…
The amount of energy given to each charged particle as it passes through the battery or power supply
What is voltage measured in
Volts
What is an ammeter
It is an instrument used to measure electrical current
An ammeter must connect in…?
series
Voltage can be measured using
A voltmeter
What is 2 facts about what’s in a parallel circuit
- the sum of currents in parallel branches is equal to the current from the supply
- the voltage across each component is the same
What is to facts about what is in a series circuit
- the current is the same in all positions
- the sum of the voltage across components is the same
What happens when more than one switch is connected in series
They all have to be closed and complete the circuit and allow the current to flow
What happens when more than one switch in series is connected in parallel.
any one or both can be closed to complete the circuit and allow the current to flow
What is electrical resistance
Is a measurement of how good an object is at reading a current to flow
