Electromagnetic induction introduction to electromagnetic induction activity 2

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Activity No #2 - Electromagnet Experiment

Estimated Time

20 minutes

Materials/ Resources needed

  1. A large iron nail(about 3 inches)
  2. Coated copper wire or enameled copper wire or threaded copper wire 2 mts
  3. D.C. Source (Battery or cells of 9 to 12 volts)
  4. Iron pieces(Feelings or pins)or other small magnetic objects
  5. A strong bar magnet
  6. Copper coil with 500 turns
  7. Galvanometer

Prerequisites/Instructions, if any

  1. students should not touch the bare portion of the wire. The current being used is low and not dangerous, but the wire will heat up.
  2. Students should not try this experiment in home A.C. Source.

Multimedia resources

Website interactives/ links/ simulations

  1. http://www.sciencebob.com/experiments/electromagnet.php

Process (How to do the activity)

Cut the wire (if needed) and loose at the other end too. Now remove about an inch of the coating from both ends of the wire and attach the one wire to one end of a battery and the other wire to the other end of the battery. See picture below. Electromagnet.gif
Now you have an ELECTROMAGNET! Put the point of the nail near the pins or iron feeling and it should pick them up.

Developmental Questions (What discussion questions)

  1. Inside the coil kept wooden stick instead of nail, can it become magnet?
  2. How does iron nail become magnet?
  3. Can it reverse to get electricity from the magnet?

Evaluation (Questions for assessment of the child)

Question Corner

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