Electricity Flashcards
What charges are in electricity
Positive and negative charges
What do like and unlike charges do
Like charges repel and unlike charges attract
describe an experiment to show the production and detection of electrostatic charges.
Rub a cloth on polythene rod. This takes away the negatively charged electrons. Then put it next to another rod. They should now attract as the electrons will attract to the positively charged rod.
what does it take to charge a body
The addition or removal of electrons
what is a conductor
A material that allows charge to flow through it
What is an insulator
A material that doesn’t allow charge to flow through it.
What is charge measured in
Coulombs (C)
What is the direction of an electric field
Away from positive and towards negative
What is an electric field
A region in which an electric charge experiences a force
What is current
The flow of charge
What is current in metals
The flow of electrons
What is current
The rate of flow of charge
What is the equation relating current and charge
I (current ) = Q (charge) / t (time)
What is the direction of flow of electrons and what is the flow direction of conventional current
Electrons flow from negative to positive and conventional current goes from positive to negative.
What is emf measured in
Volts
