Elenco Upgrade Kit SC500 to SC750 - Manual (Page 74)

Straighten and
bend paperclip
-73-
Project #666 Adjustable Paperclip Suspension
Project #667
OBJECTIVE: To show how electricity can lift things using magnetism.
Adjustable Paperclip w/ Delay
Use the LOW (or 10mA) setting on the meter (M2).
Take a paperclip and straighten it out, bend it in
half, and place it into the electromagnet (M3)
center. Turn on the press switch (S2) and set the
adjustable resistor (RV) control lever all the way to
the right. The paperclip gets sucked into the center
of the electromagnet and stays suspended there.
Now quickly slide the adjustable resistor lever all
the way to the left, and watch the paperclip and the
meter reading. The paperclip slowly gets lower, as
the meter shows the current dropping. This circuit
is similar to project #666, but the capacitor delays
the effect of changing the adjustable resistor
setting.
Use the LOW (or 10mA) setting on the meter (M2). Take a
paperclip and straighten it out, bend it in half, and drop it
into the electromagnet (M3) center. Turn on the slide
switch (S1) and set the adjustable resistor (RV) control
lever all the way to the right. The paperclip gets sucked
into the center of the electromagnet and stays suspended
there.
Now very slowly move the adjustable resistor lever to the
left, and watch the paperclip and the meter reading. The
paperclip slowly gets lower, as the meter shows the
current dropping. When the current is at zero, the
paperclip is resting on the table.
Add two more 1-snaps under the electromagnet to make
it higher, and try this again. Or try using a different iron
object in place of the paperclip.
Drop in
Straighten and
bend paperclip
OBJECTIVE: To show how electricity can lift things using magnetism.
Drop in