Question

why does a charged glass rod attract a plastic straw rubbed with polythene

Answer 1

A charged glass rod has positive charges on its surface while a charged plastic straw has negative charges on its surface. Since unlike charges attract each other, a charged glass rod attracts a charged plastic straw. ... Hence, lightning conductors protect a building from lightning.

Answer 2

A charged glass rod attracts the plastic straw rubbed with the polythene.

Explanation:

• The plastic straw when rubbed over the polythene it is attracted by the glass rod. This is due to generation of the static charge.
• When the charged glass rod is brought near the charged plastic straw which is charged due to rubbing with the polythene.
• This occurs due to the fact that glass rod accepts the excess electrons and the glass rods becomes negatively charged and the plastic straw give away electrons and becomes positively charged. This occurs because the opposite charges have a strong force of attraction.

Learn more about force of attraction:

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