Name ___________________
# ______ Date
__________
Name ___________________
# ______ Physics
Name ___________________
# ______ Section
______________
Part I
Electromagnetism Lab (Group Lab)
(54 points)
Your challenge
in this lab is to create a strong electromagnet. You will use some wire, a
nail, electric tape and a power source.
1.
From
your notes, list 3 characteristics of a strong electromagnet. (9
points)
2.
Everyone
will get 4 meters of wire to make an electromagnet. However, you will have to decide on the thickness you want for
your wire.
Which
wire did you choose? Thin? Moderately thin? Thick?? (Circle) (5
points)
3.
Explain why you think the wire you choose will make a stronger magnet. (5
points)
4.
What
does the iron nail do to increase the magnetism created by the wires? (see
notes) (5 points)
5. Name two other good cores that
could be used in your electromagnet. (5 points)
Making your magnet: 1) Wrap your wire around your nail 2) Sand off
the coating on the ends your wire 3) Wrap your electromagnet with the
electrical tape 4) Attach the wires to your source
1. What
could you do to 'quantify' the strength your magnet? (5 points)
2. Put a compass at both ends of your
electromagnet. Draw an arrow into the compasses illustrated in this picture to
show how the North Pole of your compass is pointing. (5 points)
Compass Compass
6. Which end is the North Pole of
your electromagnet? The pointed end or the flat end? CIRCLE YOUR CHOICE (5
points)
7. What could you do to reverse the
poles of this magnet? (5 points)
8.
Use
the correct Left Hand rule to determine the direction of the current in front
of the nail. Draw arrows into the picture below to show how the current is
moving (5 points).
World’s Simplest Motor Lab (25 points)
Use the
directions given on the second page of this lab to construct your simple
electric motor.
When your
motor finally works call me over to sign this sheet _______________
1.
Discuss the role of each major part of your motor. Explain how each part is
involved in making the motor work (6 points)
__________________
-
__________________
-
__________________
-
2.
Why
did you have to scrape the enamel coating off the ends of the wire? (2points)
3.
What
2 techniques could be employed that would change the direction that your motor
spins? (4 points)
________________________________ ______________________________
4.
List
three ways you could redesign this motor to make it stronger. (6 points)
a) b)
c)
5.
Name the two kinds of magnets in your motor. (2
points)
________________________________ ______________________________
6.
Pull
out the magnet in your motor. Connect the wires and start the motor with a
push. Describe what happened and explain it. (2 points)
7. How would you totally redesign your motor to
make it faster? (3 points)
