We can also charge an object without touching it through a process called induction, which is when we polarize an object and then separate the polarized ends within that object, as shown in the diagram below: Diagram iv. Diagram i. Diagram uni. Diagram ii. The excess charge Sphere Bis separated from distributes itself Two metal spheres polarization are mounted on The presence of a - charge sphere A using the insulating uniformly over the insulating stands. induces e" to move from stand. The two spheres have urface of the spheres. sphere A to B. The two- sphere system is polarized. opposite charges. Summary Questions attract each other. Three pieces of tape are labeled A, B, and C respectively. Tape A is known to be positive and attracts B, but repels C. Tapes B and C neutral 1 . What is the charge of Tape B? (circle all that may apply) negative positive neutral 2. What is the charge of Tape C? (circle all that may apply) negative positive 3. How do you know? A balloon with a lower electron affinity than the hair on your head is rubbed on your head and becomes charged. It's then brought near a wall and sticks to the wall without anyone holding it there. 4. What is the charging method used to charge the balloon? 5. (balloon/ hair). Which way will the electrons travel? From the (balloon/hair) to the 6 . Which object now has a positive charge? (circle one) . balloon hair 7. Which object has a negative charge? (circle one) balloon hair 8. How do you know? 9. What is the charging method that causes the balloon to stick to the wall? 10. Determine if the system is balanced or unbalanced, then Force Diagram X Y construct a force diagram, x/y table, and net force equation to model the motionless balloon. Fnet Equation Balanced or Unbalanced? circle one