Can an object be charged negatively with the
help of a positively charged object?

1. Yes, by rubbing the two objects together
2. Yes, by bringing the positively-charged
object near the object to be charged, then
discharging the far side
3. Yes, by bringing the positively-charged
object near the object to be charged, then
discharging the near side
4. Yes, by letting the two objects touch each
other
5. No; negative charges can only be obtained
with other negatively charged objects.