A
What kind of charge does an electron have?
Negative
-10
Static electricity happens when:
Electric charges build up on an object
-20
An object with too few electrons is:
Positively charged
-10
Why would an electromagnet be used in a recycling yard instead of a permanent magnet?
It can be turned on and off
-10
In a parallel circuit, if one light bulb burns out, what happens to the other bulbs?
The rest stay on
+10
What happens when two objects with the same charge are near each other?
They repel
+10
What type of circuit allows electricity to travel along multiple paths?
Parallel circuit
-20
What is the main difference between static electricity and current electricity?
Static electricity builds up; current electricity flows continuously
-20
Which setup creates a stronger magnetic field?
a) One battery and 10 wire coils
b) Two batteries and 20 wire coils
c) One battery and a plastic nail
d) No batteries but 50 wire coils
Two batteries and 20 wire coils
-10
Which term means the study of how electric currents produce magnetic effects?
Electromagnetism
+20
What does a closed circuit allow?
Electricity to flow
+20
What is the flow of electrons called?
Electric current
+10
Why are electrical wires coated in rubber or plastic?
To prevent electric current from escaping
+20
What is voltage a measure of?
The force pushing electrons through a circuit
+20
Name the particles that make up an atom
electrons, neutrons, protons
-20
Name an insulator
copper, iron, etc.
-10
What happens when you rub a balloon on your hair and it sticks?
The balloon builds up static electricity
+10
describe the difference between a conductor and an insulator
Conductors allow current to flow; insulators block it
+20
Which of the following best describes an open circuit?
a) A circuit with two batteries
b) A circuit where electricity flows freely
c) A circuit with a broken or incomplete path
d) A circuit that contains a magnet
A circuit with a broken or incomplete path
-10
it contains electrolytes
+10
What are the three main parts of an electric circuit?
Source, path, device
+20
An object with too many electrons is:
Negatively charged
+10
If your electromagnet is only able to pick up five paper clips, what should you do?
Add more batteries or coils
+10
Which material would be the best conductor?
a) Rubber
b) Glass
c) Copper
d) Wood
copper
+10
What creates a magnetic field in an electric circuit?
flowing electrons
-10