Transcript Magnetism Think then MC

proton

v
B Field out of screen
Which
free abody
represents
the moment
Construct
free diagram
body diagram
that represents
the
when
the proton
enters
theenters
magnetic
field region?
moment
when the
proton
the magnetic
field
region.
1

F field on p

Fearth on p
2

Ffield on p

Fearth on p
3


Fearth on p Ffield on p
An electron is moving to the right across a magnetic field that
is coming out of the page.
Which
pictorial
representation
matches
the
above
Construct
a pictorial
representation
that
matches
description?
the above description.
1
2
3
4 No picture represents this situation accurately.
S
N
A
+
-
Which
diagram
below that
describes
the situation
at at
Construct
a diagram
describes
the situation
point
(All are current,
at right angles)
pointA?
A showing
B field and the force of
the
magnetic
field
on
current.
2
1
current
B field
current
A
A

F magnet on current
B field

F mag. on current
3
current
A
B field

F magnet on current
An electron is moving to the right at a constant speed and
enters a magnetic field that is pointed towards the right.
Which
motion
diagram
matches
the
above the
Construct
a motion
diagram
that
matches
description?
above description.
1
3
4
2
5
The current in the top wire is larger then in the bottom wire.
I
I
Which
forcea diagram
represents
the forces acting
Construct
force diagram
that represents
the
on
the wires
thedue
magnetic
forces
actingdue
on to
theonly
wires
to onlyfields?
the magnetic

1
fields.
2
Fbot.on top
3

Fbot.on top

Ftop on bot.

Fbot.on top

Ftop on bot.

Ftop on bot.
B
A
+
–
What is the direction of the magnetic field at points
A and B due to the current in the wire?
A
B
1
Into screen
Out of screen
2
Out of screen
Into screen
3
Into screen
Zero field
4
Out of screen
Zero field
B
I
I
A
What is the direction of the magnetic field at points
A and B due to the currents in the wires?
A
B
1
Into screen
Out of screen
2
Out of screen
Into screen
3
No field
Into screen
4
No field
Out of screen
What should be the orientation of the terminals on
the battery?
1 Positive on left, negative on right
2 Negative on left, positive on right
3 Field will not look like this at any orientation,
it will be out of or into the page.
Two
Twocarts,
carts,initially
initiallyatatrest,
rest,have
havelarge
largemagnets
magnetson
ontop
topofof
them
themso
sothat
thatthe
thecarts
cartsmove
movetowards
towardseach
eachother.
other. Which
Write a
description
the above
picture?
descriptionbest
that matches
best matches
the above
picture
eachtoward
carts each
velocity
and
acceleration.
1.concerning
The carts move
other
with
constant velocity.
2. The carts move toward each other with constant
acceleration.
3. The carts will start with constant acceleration, but the
acceleration will increase once the carts are very close.
4. The acceleration of the two carts will constantly increase
as they move closer together.
S
N
Two
diagram
Twomagnets
magnetsare
arehung
hungas
asseen
seenabove.
above. Which
Construct
a
below
represents
therepresents
magnetic field
lines?
diagram
below that
the magnetic
field lines.
1
2
3
4