Electricity and Magnetism Flashcards
A material which easily allows an electric current is
an electrical conductor
A material which does not allow an electric current is
an electrical insulator
Name some good electrical conductors
Any metal (some are better than others!), graphite (a form of carbon), salt water
Name some good electrical insulators
Wood, plastic (most non-metals in fact)
Draw the circuit symbol for a cell
Draw the circuit symbol for a battery
Draw the circuit symbol for a bulb
Draw the circuit symbol for a switch
Draw the circuit symbol for a variable resistor
Draw the circuit symbol for an ammeter
What instrument is used to measure current?
Ammeter
What does an ammeter measure?
Current
What is the unit of current and what is its symbol?
Amperes, A
If I increase the number of cells in my battery the current will…?
Increase
When the charge moves through the cell it gains…?
energy