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Wind the magnet wire five to seven times around the battery to form a tightly overlapping coil. Start winding about 3 inches from one end of the wire and leave about 3 inches of wire free at the other end. Slide the coil off the battery.2
Wind one of the free wires three or four times around the near side of the coil to hold it together. Leave the remainder of the wire sticking straight out from the center of the coil, like the stick of a lollipop. Repeat this step at the opposite side of the coil so that both sides are tightly bound and the free wires form a straight line that bisects the coil. The finished rotor should look like this: —o—
3
Hold the rotor upright with one of the free wires on the table. Sand the top of the wire lightly to remove its thin coating of insulation, starting about 1/2 inch from the coil. Hold the wire firmly and sand it carefully to avoid removing insulation from the sides or bottom.
4
Turn the coil around. Sand the other free wire completely so that no insulation remains, again starting about 1/2 inch from the coil. Straighten and center both wires as necessary.
5
Put one of the disk magnets inside the plastic cup. Put the other disk magnet against the outside bottom of the cup so that the magnets hold each other in place. Center the magnets to each other and to the bottom of the cup. Turn the cup upside-down so that the exterior magnet sits on top.
6
Unbend the large loop of each paper clip to form a straight post ending in a small loop. Tape the straight end of one paper clip to the side of the inverted cup — near the top — so that it stands upright over the cup and the small loop faces you. Tape the other paper clip to the opposite side of the cup in the same way.
7
Rest the rotor’s straight wires in the small loops of the upright paper clips. Adjust the paper clips so that the rotor is level and the coil sits directly over the magnet. The bottom of the coil should be as close as possible to the magnet without touching it. Spin the rotor by hand to make sure it t
Royal National College
The Royal National College for the Blind (RNC) is a co-educational residential college of further education based in the English city of Hereford. Students who attend the college are blind or partially sighted. Alongside regular further education subjects and vocational training, the college offers training in independent living and personal development. Founded in 1871 in London as The Royal Normal College and Academy for the Blind, the college had a number of homes before moving to its campus in Hereford, and was renamed Royal National College for the Blind in the late 1970s. It has been a pioneer in the education of visually impaired people in Britain since the Victorian era, and, as of 2010, is the only college for visually impaired students in the United Kingdom to have been awarded Beacon Status in recognition of its outstanding teaching and learning. The college is actively involved in the development of assistive technology to help visually impaired people in their day-to-day lives. The campus, located on College Road, Hereford, is home to RNC's teaching, residential and leisure facilities. Students live in halls of residence or on-campus houses which enable them to gain a level of independence within the college environment. (more...)
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ow to Make Electromagnet with AC Power
Instructions
Things You'll Need
Wire cutter 28-gauge insulated wire, cut into 24-inch-long strips 3-inch-long iron or steel bolt 24-inch-long 22-gauge insulated wire strip transformer 2 to 3 alligator clips or tape 20 paper clips and other magnetic objects Scissors to strip the wire
Creating the Magnet
1
Tightly wrap the wire evenly in a coil around the bolt, leaving 3 or 4 inches of wire loose at each end.
2
Attach one end of the transformer to one end of the coil, attach the other end of the transformer to the other lead.
3
Try picking up the paper clips or other metal objects.
Things You'll Need
Wire cutter 28-gauge insulated wire, cut into 24-inch-long strips 3-inch-long iron or steel bolt 24-inch-long 22-gauge insulated wire strip transformer 2 to 3 alligator clips or tape 20 paper clips and other magnetic objects Scissors to strip the wire
Creating the Magnet
1
Tightly wrap the wire evenly in a coil around the bolt, leaving 3 or 4 inches of wire loose at each end.
2
Attach one end of the transformer to one end of the coil, attach the other end of the transformer to the other lead.
3
Try picking up the paper clips or other metal objects.
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