Magnetism and Electricity Review Flashcards
What is a natural form of electricity?
lightening
Atoms consist of
electrons, protons and neutrons
What makes up a nucleus
protons and neutrons
The electrical charge for a neutron is
it has no charge
What charge has the negative
electrons
What kind of charge does a proton have?
positive charge
If two charged objects are attracted to each other, what are their charges?
one is positive and one is negative
If two charged objects are repelling one another, what are their charges?
the same (- and -) or (+ and +)
A naturally magnetized iron ore is called
a lode stone
electromagnets are made by
electricity passing through a coil of wire which produces a field of magnetism around the wire
Magnetic fields surround….
magnets
Electricity flows easily through
conductors
Electricity does not flow through
insulators
What is a resistor?
slows down the flow of electricity
Why does a compass needle move when connected to a circuit?
Because the circuit produces a magnetic field
What is the one thing you are allowed to change in a controlled experiment?
manipulated variable (changed variable)
A short circuit will cause
the wire to overheat
To make a bulb glow brighter you can
add more batteries
a control device in an electric circuit is called
a switch
a resistor is also known as a
semi conductor
electrical use is measured in
kWh (kilowatt hours)
How can we use electricity wisely?
By turning off the lights in rooms that your aren’t in
Insulation in our walls and roof is important because
Because insulation keeps warmth in the house
Why is solar energy a good choice?
Because you are using the sun to produce electricity which is more natural
