Priority Level: High (ECE) & Medium (ECT)
Air
Copper
Iron
Salt water
the number of neutrons
the number of protons
the number of neutrons plus the number of protons
the number of electrons
the number of neutrons
the number of protons
the number of neutrons plus the number of protons
the number of electrons
18
8
10
16
Is electrically neutral
Has positive electric charge
Has negative electric charge
Can have either a positive or negative charge
Is electrically neutral
Has positive electric charge
Has negative electric charge
Can have either a positive or negative charge
Can consist of a single atom of an element
Always contains two or more elements
Always has two or more atoms
Is always electrically charged
There can be a single atom of an element
There must always be two or more elements
The atoms are mixed in with each other but not joined
There is always a shortage of electrons
By heating it
By cooling it
By ionizing it
By oxidizing it
Air
Copper
Iron
Salt water
Is like a flow of electrons in the same direction
Is possible only if the current is high enough
Results in a certain amount of electric current
Causes the material to stop conducting
It is a good conductor
It is a poor conductor
The current flows mainly in the form of holes
Current can flow only in one direction
Represents a current of 1 ampere
Flows through a 100-watt light bulb
Is equivalent to 1 ampere per second
Is an extremely large number of charge carriers
Is caused by a movement of holes in an insulator
Has a very low current
Is a discharge of static electricity
Builds up between clouds
Current
Charge
Electromotive force
Resistance
Half an ampere
1 ampere
2 amperes
Impossible to determine
An inefficient, energy-wasting device
A motor with the voltage connected the wrong way
An electric generator
A magnetic field
Connecting it to a light bulb
Charging it
Discharging it
No means known; when a battery is dead, you must throw it away
Produces an electric current in an insulator
Magnetizes the earth
Produces a fluctuating electric field
Results from a steady electric current
in a dry cell
In a wet cell
In an incandescent bulb
In a photovoltaic cell