Question

When rubbed against a silk cloth, a glass rod loses electrons. How does this affect the charges of the glass rod and the silk cloth?

a) the glass rod becomes positively charged, and the silk cloth becomes negatively charged
b) the glass rod becomes negatively charged, and the silk cloth becomes positively charged
c) the glass rod and the silk cloth both become positively charged
d) the glass rod and the silk cloth both become negatively charged