Name: Lab Partners:
Date:
Homework
Electric Charge and Electric Interactions
1. Explain why there must be more than one type of charge to explain the observa-
tions you made in investigation 1.
2. It is always the case that electrostatic forces act along the line of the two charges,
either attractive or repulsive. Could there be a third type of charge? Why or
Why not?
3. It seems that clothes, when they are just taken out of the dryer, always attract lint.
Sometimes the clothes are positively charged, and sometimes they are negatively
charged, but either way the clothes always attract lint, not repel it. Explain
why, using the dependence of the electric force on distance, and what you have
learned about the direction of forces exerted by one charge on another charge in
the laboratory.
4. Make a drawing showing a positively charged rod approaching a neutral ball.
Show which way the atoms of the neutral ball become polarized.
PHYS-204: Physics II Lab oratory 1