As you walk across a synthetic-fiber rug on a cold, dry winter day, you pick up an excess charge of (a) How many excess electrons did you pick up? (b) What is the charge on the rug as a result of your walking across it?

Answers:

A. e = -1.6 X10^-19.

B. +55 x 10^-6 C.

Explanation:

A.

Each electron has a charge of 1.6 x 10^-19 C.

So therefore,

N electrons would have a charge of = N * 1.6 x 10^-19 C

= 1.6 x 10^-19 N.

Ne = Q(charge)/e(charge)

e = -1.6 X10^-19

B.

Charge on the rug is +55 x 10^-6 C. Electrons on you were transferred from the rug. So the rug has the opposite charge from you.