Iron filings align themselves in strong magnetic fields. This reveals the shape of the field patterns. A similar thing happens with the electric fields created by high voltage and by "static electricity." If small fibers are exposed to a very strong electric or magnetic field, they will align with the field and make it visible.
There are a number of science museum exhibits which require many tens of
amperes of electric current in a thick cable to generate strong magnetism.
One example is a raft of compasses with a 200-amp cable running through
the center of the raft. Or, three 100-amp cables with three-phase AC
powering them, where the resulting field rotates and can spin a conductive
object by induction
This science fair project investigates how the magnetic field emanating from a permanent magnet will affect the rate of flow of water through a narrow passage. The experiment will be done using salt solution and tap water, with a magnetic field as well as without a magnetic field.
I originally built this toy using a Canadian nickel coin. Canadian nickels are made of pure nickel, unlike U.S. nickels, which contain so much copper that they are not magnetic. You can build the toy with the nickel or with the Radio Shack rare-earth magnet.
This science fair project was conducted to find out how temperature affects the strength of a magnet. The tests were done using 5 permanent magnets at 0 degrees Celcius, 25 degrees Celcius, 50 degrees Celcius, 75 degrees Celcius and 100 degrees Celcius.
Science kits, science lessons, science toys, maths toys, hobby kits,
science games and books - these are some of many products that can
help give your kid an edge in their science fair projects, and develop
a tremendous interest in the study of science. When shopping for
a science kit or other supplies, make sure that you carefully review
the features and quality of the products. Compare prices by going
to several online stores. Read product reviews online or refer to