Case: Read the passage and answer the following questions

Historically the credit of discovery of the fact that amber rubbed with wool or silk cloth attracts light objects goes to Thales of Miletus, Greece, around 600 BC. The name electricity is coined from the Greek word ‘electron’ meaning amber. Many such pairs of materials were known which on rubbing could attract light objects like straw, pith balls and bits of papers. For example, cut out long thin strips of white paper and lightly iron them. Take them near a TV screen or computer monitor. We can see that the strips get attracted to the screen. In fact they remain stuck to the screen for a while.

What happens when two glass rods rubbed with wool are brought close to each other?

Repels each other

The glass rods become positively charged when they are rubbed against wool. So, when brought in the appropriate vicinity of each other, they repel.