+
ward
'
s
science
Page 4
Making an Electromagnet: Test Your Understanding
1. Use graph paper to construct a graph relating the number of BBs picked up by the electromagnet and
the number of turns of wire in the electromagnet. Determine which axis should be labeled Number of BBs
picked up and which should be labeled Number of turns of wire.
2. What represented the core of the electromagnet you constructed?
3. What represented the solenoid of the electromagnet you constructed?
4. What would be the control variables in this investigation?
5. What would be the independent variable in this investigation?
6. What would be the dependent variable in this investigation?
7. How is the strength of the magnetic force of an electromagnet related to the number of turns of wire?
8. Explain how your graph supports your answer to question 7.
9. Use your graph to predict how many BBs a bolt wrapped with 50 turns of wire will pick up.
Modeling:
Model your 10 coil electromagnet to include the following:
• Magnetic field lines
• Labeling the poles
• # of coils
• # of BB's attracted
• Magnet domain of the BB's
