physics cheats unit 1 test Flashcards
(15 cards)
What is an electric current
The rate of flow of charge(The charge flowing per second)
What is the unit of charge
Coulomb (c)
What is the equation that links current ,charge and time
Current = charge /time
Charge = current x time
Time = Charge/ current
What does the term voltage mean
The energy transferred per coulomb of charge
What is meant by electrical resistance
The opposition to the flow of charge or the opposition to the current
Name 2 factors that affect the resistance of a wire
The material, the length of the wire , the thickness of the wire,
The temperature of the wire
How are components connected in a parallel circuit
The components are connected end to end, one after the other
What is another name for voltage
Potential difference (p.d)
What is a non- renewable energy resource
Being used up faster than it is being replaced
In a power station what is the job of a generator
To convert Kinetic energy into electrical energy
Name three fossil fuels
Coal , oil, natural gas
What is the national grid
A network of power stations and cabling that carries electricity around the country
Why is the casing of a plug made from plastic or rubber
Because plastic/rubber is a good electrical insulator
What colour is the insulation on the earth wire
Green and yellow
What is the main voltage
23OV
