Question

When a glass rod is rubbed against silk, the glass rod becomes positively charged. Then the charge on the silk cloth is ______.

Options

• positive

• negative

• positive or negative depending on the quality of silk

• nothing can be decided

Answer 1

When a glass rod is rubbed against silk, the glass rod becomes positively charged. Then the charge on the silk cloth is navegative.

Explanation:

When rubbed, electrons move from glass to silk, so glass becomes positive and silk becomes negative with equal and opposite charge. Positive charge on silk is wrong because silk gains electrons. The quality of silk does not change the sign, so it is wrong.