WorksheetsElectricity & Magnetism
Total questions: 23
Worksheet time: 13mins
Opposite electric charges do this
repel
attract
nothing
Like electric charges do this
repel
attract
nothing
Has a negative charge
proton
neutron
electron
megatron
Has a positive charge
proton
neutron
electron
megatron
Like magnetic charges do this
repel
attract
nothing
Opposite magnetic charges do this
repel
attract
nothing
Are the charges on tape strips in picture A the same or opposite?
same charges
opposite charges
The girl's hair has a negative charge because the ___ moved out of ___ and into ___.
protons; the balloon; her hair
electrons; her hair; the balloon
protons; her hair; the balloon
electrons; the balloon; her hair
What poles should go where the question marks are in the picture here?
N and N or S and S
N and S
+ and -
+ and + or - and -
Will magnet A “float”?
yes
no
magnets never float
What are these?
armatures
solenoids
audio speakers
What is the object labeled X ?
armature
solenoid
audio speaker
Why does one go in and the other go out?
electrons flow the opposite direction
direction of current changed
flipped the battery
all of these
Why must a speaker have both a wire coil and a magnet to work properly? (check ALL that apply)
the wire coil becomes a magnet when current flows through it
the 2 magnets attract and repel each other
the attracting and repelling causes vibrations
it makes the solenoid spin
What are two (2) ways to change the strength of our electromagnets?
more power (batteries)
more wire coils
more paper clips
more magnets
What two (2) factors affect the strength of magnetic force?
color of magnet
distance
shape of magnet
size of magnet
Which pair of magnets has the smallest magnetic force?
1
2
3
4
Are the charges on tape strips in picture B the same or opposite?
same charges
opposite charges
Will magnet A “float”?
yes
no
magnets never float
What poles should go where the question marks are in the picture here?
N and N or S and S
N and S
+ and -
+ and + or - and -
Which circuit is open?
A
B
both
neither
Which circuit is closed?
A
B
both
neither
Which of these is correct for the energy transformations in our audio speakers?
chemical ⇢ electrical ⇢ radiant ⇢ sound
elastic ⇢ electrical ⇢ mechanical ⇢ sound
chemical ⇢ electrical ⇢ mechanical ⇢ sound
chemical ⇢ electrical ⇢ mechanical ⇢ nuclear
