Download Electricity and Magnetism

Electricity and Magnetism
A review
An electric circuit with only one path
for current is a __________________
Series Circuit
What will happen if you remove a light
bulb from this circuit?
All of the light bulbs will go out
What will happen if you add a light
bulb to this circuit?
All of the light bulbs get dimmer
Why won’t this electric circuit light?
There is no power source
Name two materials that are good
conductors of electricity
Most metals: copper, silver, gold, aluminum, and
salty water are some examples
What is a continuous pathway that
carries an electric current
Electric circuit
What is an electric circuit with two or
more paths for current?
parallel circuit
What will happen if you remove a light
bulb from this circuit?
The other lights will still work
What will happen if you add a light
bulb to this circuit?
The other lights will stay the same and NOT get
dimmer.
What provides energy to power the
movement of the current?
Power source
Rubbing a balloon and then sticking it
on the wall is an example of
Static Electricity
How are magnets and electromagnets
different?
Electromagnets are temporary and can be
turned on and off. Also you change the
strength of an electromagnet.
Which of these will repel and which
will attract?
A
-
-
B
+
-
C
+
+
A, C, repel
B, attracts
What is the best type of circuit for a
home or school and why?
A parallel circuit, so that if one item using electricity
stops working, everything won’t stop working.
Also, you don’t have to turn on all electrical
appliances so that one will work.
Name two insulators
Plastic, rubber, wood, air
What is the difference between an
open and closed circuit?
A closed circuit is a complete circuit that
electrical charges can pass through to create
power. An open circuit will not work
because it has a break in the circuit.
What three things do you need to
make a simple electric circuit?
A power source (such as a battery)
A conductor (such as wire)
An item to be powered (light bulb)
Why is current electricity more useful
than static electricity?
Current electricity is a steady flow of electrons
and can be controlled, while static
electricity is uncontrolled without a certain
path.
What do you call a material through
which heat and electricity flow easily?
A conductor
What does it mean when an electrical
charge is neutral?
It has the same number of positive and
negative electrical charges
If an electrical charge isn’t neutral, it is
either__________ or ___________?
Positively charged or negatively charged
Why won’t this light bulb light?
The wire needs to be connected to the positive
and negative sides of the battery.
Give an example of current electricity
being used.
Various answers
Name two ways you can make an
electromagnet stronger.
1. Increase the number of coils in the
wire
2. Add more power (another battery)
Name two ways you can make an
electromagnet stronger.
1. Increase the number of coils in the
wire
2. Add more power (another battery)
What do you call a material through
which heat and electricity DO NOT
flow easily?
An Insulator
What do you call a buildup of charges
on an object?
Static electricity
Name one item found in a school you
could use for a conductor and one
item you could use for an insulator
Various answers
What is an electromagnet?
A temporary magnet made up of currentcarrying wire wrapped around a core
What type of charges move easily
through conductors in an electric
circuit?
negative
Why are insulators important in
electricity?
One reason is to protect you from the
conductors carrying electricity
Which of these is a closed circuit?
Which is necessary to power an item?
Closed circuit on right