Question

a cat rubs against a balloon. afterward, the balloon sticks to the cat as shown below.
complete the explanation of this phenomenon.

• the cat and balloon are dropdown each other.
• so, when the cat rubbed the balloon, dropdown charges must have built up on the cat (with options attracting,repelling shown in one dropdown).

Explanation:

When the cat rubs against the balloon, static electricity is generated. The cat and balloon acquire opposite electric charges (due to the transfer of electrons during rubbing). Opposite charges attract each other, so the balloon sticks to the cat. So the first blank should be "attracting" as the balloon is sticking (showing attraction), and the charges on them are opposite (since opposite charges attract).

Answer:

• The cat and balloon are $\boldsymbol{\text{attracting}}$ each other.
• So, when the cat rubbed the balloon, $\boldsymbol{\text{opposite}}$ charges must have built up on the cat and the balloon (to cause attraction, as opposite charges attract).