Static Electricity with Comb and Paper · CAP 2017 #1
Physics · electromagnetism
Problem
On a dry day you comb your hair. Afterwards you notice that bringing the comb close to small bits of paper attracts the paper, causing it to jump off the table towards the comb. The correct explanation for this phenomena involves:
a) The comb is positively charged after combing, and the paper is negatively charged.
b) The comb is negatively charged after combing, and the paper is positively charged.
c) The comb is charged and the paper has no net charge.
d) The comb has no net charge and the paper has no net charge.
e) The comb has no net charge, the paper has positive charge.