Understanding Electric Charges and Lightning

The video explains natural phenomena like electric sparks and lightning, highlighting Benjamin Franklin's discovery of electric charges. It covers how objects acquire charge through rubbing, the types of electric charges, and how charges are transferred. The concept of earthing is also discussed to prevent electrical shocks.

What did ancient people believe about lightning?

• It was a natural phenomenon.

• It was a sign of good luck.

• It was the wrath of God.

• It was caused by electric charges.

Who demonstrated the connection between lightning and electric charges?

• Benjamin Franklin

• Isaac Newton

• Nikola Tesla

• Albert Einstein

What happens when you rub a comb on a cloth and bring it close to your hair?

• The hair gets wet.

• The hair changes color.

• The hair falls flat.

• The hair stands up.

What is the result when two objects with the same type of charge are brought close to each other?

• They attract each other.

• They repel each other.

• They explode.

• They neutralize each other.

What is the charge on a glass rod when rubbed with silk?

• Positive

• Neutral

• Negative

• No charge

How can electric charge be transferred from one object to another?

• Through air

• Through water

• Through a vacuum

• Through a conductor

What happens to aluminum foils when a charged object is brought near them?

• They melt.

• They repel each other.

• They attract each other.

• They change color.

What is the purpose of earthing in buildings?

• To increase voltage

• To prevent electrical shocks

• To save electricity

• To reduce noise

What is the nature of electric charges generated by rubbing?

• They are neutral.

• They are static.

• They are explosive.

• They are dynamic.

What is the relationship between objects made of different materials?

• They explode.

• They neutralize each other.

• They attract each other.

• They repel each other.