Understanding Static Electricity

The video explores static electricity, a phenomenon known since ancient Greece. It explains how static electricity is generated through friction between non-metal insulators, leading to electron transfer and charge imbalance. Demonstrations illustrate how like charges repel and opposite charges attract. Practical applications and safety concerns, such as preventing sparks during fueling, are also discussed.

What is the main difference between static and current electricity?

• Static electricity only occurs in metals, while current electricity occurs in non-metals.

• Static electricity involves stationary charges, while current electricity involves moving charges.

• Static electricity is a recent discovery, while current electricity has been known for over 2000 years.

• Static electricity involves moving charges, while current electricity does not.

What historical fact is mentioned about static electricity?

• It was first observed in the 20th century.

• It was discovered by Thomas Edison.

• It was first written about over 2000 years ago in ancient Greece.

• It was discovered in the 19th century.

How are charges created when two non-metal insulators are rubbed together?

• Electrons are transferred from one material to another.

• Neutrons are transferred from one material to another.

• Protons are transferred from one material to another.

• Atoms are transferred from one material to another.

What happens to the charges on a material when electrons are removed?

• The material becomes negatively charged.

• The material becomes positively charged.

• The material becomes neutral.

• The material becomes heavier.

What happens when two identical charged rulers are brought close to each other?

• They stick together.

• They repel each other.

• They attract each other.

• They become neutral.

What causes a balloon to stick to a wall after being rubbed against a cloth?

• The balloon becomes heavier.

• The wall becomes positively charged.

• The balloon induces a charge separation in the wall.

• The balloon loses its charge.

What is observed when a charged plastic comb is brought near a stream of water?

• The water stream is attracted.

• The water stream is repelled.

• The water stream evaporates.

• The water stream becomes charged.

What is the effect of rubbing a rubber balloon against hair?

• The balloon loses its charge.

• The balloon becomes positively charged.

• The balloon becomes negatively charged.

• The balloon becomes neutral.

Why is it important to use an earthing cable during fueling?

• To increase the flow of fuel.

• To prevent fuel from evaporating.

• To prevent a static spark from igniting the fuel.

• To cool down the fuel.

What is a common experience of static electricity in daily life?

• Feeling a warm sensation when touching a plastic object.

• Seeing a bright light when turning on a switch.

• Hearing a click and feeling a shock after touching a metal object.

• Hearing a loud noise when walking on a carpet.