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Coordinated Control
Nuclear Transplants
Uncovering a Signal

You may wish to use this activity to introduce, review, or enrich students' understanding of schematic diagrams. The materials needed for this activity can be purchased at a local hardware store or electronics specialty shop.

SAFETY: Review all safety procedures associated with heat generated by this type of electromagnetic circuit. Remind students to keep the circuit closed for ONLY short periods of time. With the current flowing, the wire will heat to temperatures that can cause burns.


  1. What caused the ball to move down the ramp (attraction of gravity)?
  2. What force diverted the ball's downward roll? (magnetic attraction)
  3. What produced the magnetic force? (When current ran through the nail's wire wrap, the nail became an electromagnet.)
  4. Suppose no magnetic attraction affected the ball's movement. Describe its path. (Ball would move straight down the incline without diverting to the side) How can this laboratory experience be applied to the challenges faced by FES? (In order to direct the ball's movement, you needed to coordinate the actions of individual magnets. Similarly, a movement such as "standing transfer" requires the coordination of muscle-stimulating electrodes - first getting up and shifting sideways to transfer into another seat. In addition, electricity was used as the input energy form to direct both movements.)

What is the advantage of this type of charging? (Reduced risk of electrocution)
Why is this type of charging utilized for meeting the electrical demands of biotech devices implanted beneath the skin? (Since the skin heals over the implant, there is a reduced chance of infection. When the battery runs out, you won't need to "plug in" a recharging wire. An induction circuit sitting on the skin's surface will power up the battery.)


 Electricity, Electric Circuits, Energy, Transformations of Energy

 Science As Inquiry-Content Standard A
 Students should develop abilities necessary to do scientific inquiry,
 Students should develop an understanding about scientific inquiry
 Physical Science -Content Standard B
 Students should develop an understanding of motion and forces
 Students should develop an understanding of transfer of energy
 Life Science -Content Standard C
 Students should develop an understanding of structure and function in living  systems
 Science and Technology -Content Standard E
 Students should develop an understanding about science and technology

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