Question

*A glass rod rubs against a silk cloth and the charge goes on the glass rod. What happens if this glass rod is brought near the hanging glass rod?*

1️⃣ The two rods are pulled towards each other.
2️⃣ The two rods push each other away.
3️⃣ Both rods remain stationary.
4️⃣ Can't say.​

Answer 1

Given:

A glass rod rubs against a silk cloth and the charge goes on the glass rod.

To find:

What happens if this glass rod is brought near the hanging glass rod?

Solution:

• When the first glass rod is rubbed against the silk cloth there is development of static electrical charges on the glass rod due to interaction with the silk cloth.

• However, second glass rod which is hanging is neutral (neither positive nor negative), because it did not experience any interaction.

• Now, when the first glass rod is brought near second glass rod, we will observe that the two glass rods attract each other.

But why attraction?

• Whenever a charged object is brought near an uncharged object there will always be an attraction between the objects.

• We won't observe repulsion because repulsion requires two similar charges near each other.

$\star$ Hope It Helps.