LAB: MAGNETIC/ELECTROMAGNETIC PHENOMENA

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18 Οκτ 2013 (πριν από 3 χρόνια και 2 μήνες)

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STATION 2:

Little Compasses

Connect the two ends of the wire across the battery and observe compasses.
What happens when the wire is c
onnected? What about when you disconnect the wire?



Which of the above
-
listed MAGNETIC/ELECTROMAGNETIC PHENOMENA best explains your
observations?


STATION 3:

Electromagnet

Connect the two ends of the wire across the battery and observe the assembly’s
ability to pick up clips. Can the assembly p
ick up clips without the battery?


Now try the Electromagnet with more coils. How does

increasing the number of turns affect

its ability to pick
up clips?


Now try changing the voltage in an electromagnet. How does increasing the voltage affect its abil
ity to pick
up clips?


Which of the above
-
listed MAGNETIC/ELECTROMAGNETIC PHENOMENA best explains your
observations?


LAB:
MAGNETIC/ELECTROMAGNETIC PHENOMENA

1.

Magnetic Fields Surround Magnets (Everyone Knows This)

2.

Magnetic Fields Surround Current
-
Carrying Conductors

3.

Charges Moving in a Magnetic Field Experience a Magnetic Force

4.

Current
-
Carrying Conductors in a Magnetic F
ield Experience a Magnetic Force

5.

Changing Magnetic Flux Induces Current in a Wire

6.

Magic















































PPT/Notes: Magnetism
http://www.stmary.ws/highschool/physics/home/notes/electricity/magnetism/default.htm


Station 7:
Electric Motor
---
Place the coil of wire on the paper clip cradle. Record observations. Place the
magnet flat on top of the battery, replace the coil, and record your
observations. Reverse the direction of

the
coil. Record observations.


Which of the above
-
listed MAGNETIC/ELECTROMAGNETIC PHENOMENA best explains your obser
vations
?


STATION 1:

Bar Magnet

Place the bar magnet on top of the mini
-
magnet plate
.
What ha
ppens?



Which of the above
-
listed MAGNETIC/ELECTROMAGNETIC PHENOMENA best explains your observations
?

STATION 5:

Induction

Move the magnet in and out of the coil of wire
QUICKLY
. Observe the ammeter as
yo
u do this, and record your observations.



Part II.
Which of the above
-
listed MAGNETIC/ELECTROMAGNETIC PHENOMENA
best explains your
observations?

STATION 6
:

Electric Generator Part II
---
Turn the crank through several turns and observe what happens.
Rec
ord your observations. Can you light the bulb when turning the crank in the opposite direction? What
happens if you crank it faster?


Which of the above
-
listed MAGNETIC/ELECTROMAGNETIC PHENOMENA best explains your
observations?


Name

___________________
____

STATION 4:
Floating Magnets

Place a magnet on the rod, then place another one on top of the first. Record
observations.



Remove the top magnet, flip it, and replace it on top of the first one again. Record observations.


Part II.
Which of the abov
e
-
listed MAGNETIC/ELECTROMAGNETIC PHENOMENA best explains your
observations?


PPT/Notes: Magnetism
http://www.stmary.ws/highschool/physics/ho
me/notes/electricity/magnetism/default.htm


____________
-

a force of attraction or repulsion due to the arrangement of electrons.


______, nickel and cobalt are magnetic because the _____________ in the material have the same _________ and
____________spi
n, creating a net electrical ___________.


Cancellation of this effect occurs in most materials since the _________ movement is ________in most matter.


________________ ________________
-

a microscopic magnetic region composed of a group of atoms whose

magnetic fields
are aligned in a common direction.


Magnets
-
like poles _______, while opposite poles _________.


Magnetic _____________ are defined as a region in which a magnetic ________can be detected.


In general, magnetic fields originate on _______
poles and terminate on _______ poles.

Sketch magnetic field lines.



Compass needles are just small
__________

which twist into alignment with the Earth

s magnetic field
.


Just as an electric charge is surrounded by an electric field, the same charge is
also surrounded by a magnetic field
if it is __________and/or if the electrons (charges in the atoms) are _________.


Moving _________, like __________in a wire, Set up Magnetic Fields.

Increasing the number of loops,__________________ the strength of the
magnetic field produced.


What is an Electromagnet? The basic idea behind an electromagnet is extremely simple: By running electric
current through a wire, you can create a ___________ ________.


How can we increase the strength of an Electromagnet?

1.






2.

Use Right
-
Hand Rule to Find Direction of B



Electromagnetic __________is the production of voltage across a



conductor situated in a
____________________

magnetic field or a


conductor moving through a
________________________

magnetic field.




Changing Magnetic Flux induces ___________. (Faraday)

________________ ___________________

can be
produced in a looped wire simply

by moving a wire near a magnet since
rapidly changing the electric field
induces a change in the
_______________________

field.


The

______________________

measures the amount of current produced by the oscillating magnetic field inside the loop.


Magnetic Fields
e
xert
_________
on
m
oving
__________ and on current
-
carrying ____
________.

A wire carrying current has
__________________

moving in it. Therefore, if a current
-
carrying conductor is in an
____________________

magnetic field, it experiences a
__________________
.


Electric Motors: Convert __________ energy into __________
___ energy.

Since the motor produces a
________________

field, it can interact with the stored data, causing devices that store
information to
___________

it.


Opposite of a motor is a
_________________________
, which uses electromagnetic induction to con
vert
__________________

energy to
__________________

energy.


An automobile
_________________________

is a type of generator that produces AC rather than DC.

S

N

I