Thinking about the effects of the positively charged electrophorus, what if we instead hold the electrophorus near the sphere and touch the opposite side of the sphere with our hand • What happens to the electrons in the sphere as the electrophorus is placed near it? • What will happen when we tap the opposite side with out neutrally-charged hand? At these scales, air is an insulator.

Thinking about the effects of the positively charged electrophorus, what if we instead hold the electrophorus near the sphere and touch the opposite side of the sphere with our hand • What happens to the electrons in the sphere as the electrophorus is placed near it? • What will happen when we tap the opposite side with out neutrally-charged hand? At these scales, air is an insulator.