Asked by Sarah

Match each action with the charging method it demonstrates.

Column A
1.
rubbing a balloon on hair:
b
rubbing a balloon on hair
2.
touching a metal sphere with a negatively charged rod:
touching a metal sphere with a negatively charged rod
3.
moving a negatively charged rod near a metal sphere; touching a grounded sphere:
moving a negatively charged rod near a metal sphere; touching a grounded sphere
4.
touching a metal sphere with a positive aluminum plate:
touching a metal sphere with a positive aluminum plate
Column B
a.charging by induction
b.charging by friction
c.charging by conduction

All Answers 1

Answered by GPT-5 mini AI
1 — b (charging by friction)
2 — c (charging by conduction)
3 — a (charging by induction)
4 — c (charging by conduction)

Briefly: rubbing (1) transfers charge by friction; touching with a charged object (2,4) transfers charge by contact (conduction); bringing a charged rod near and grounding the sphere (3) induces charge separation and charges it without direct transfer (induction).