The video tutorial explains how a simple circuit works to light a bulb. It describes the flow of electrons from the negative side of a battery through the bulb's filament, converting electrical energy into light and heat. The concept of complete and closed circuits is introduced, emphasizing the necessity of an unbroken path for electricity to flow. The role of insulators in preventing short circuits is discussed, highlighting how they ensure electrons follow the intended path.

What is a circuit?

• A route through which electrical current can flow

• A type of light bulb

• A device that stores electrical energy

• A type of battery

Where do electrons flow from in a simple circuit involving a D-cell battery?

• The top of the battery

• The positive side of the battery

• The middle of the battery

• The negative side of the battery

What happens to some of the electrical energy when electrons go through the filament?

• It remains unchanged

• It is stored as chemical energy

• It is lost as sound energy

• It is converted to heat and light energy

What is the part of the bulb that actually lights up called?

• The insulator

• The filament

• The base

• The wire

What is necessary for a light bulb to light up in a circuit?

• A closed circuit

• An open circuit

• A short circuit

• A broken path

What is the path that electrons follow in a complete circuit called?

• An open circuit

• A closed circuit

• A short circuit

• A broken circuit

Why will electricity only flow on an unbroken path?

• Because it needs a complete circuit

• Because it needs a short circuit

• Because it needs a broken path

• Because it needs an open circuit

What is the role of an insulator in a circuit?

• To easily accept and pass on electrons

• To store electrical energy

• To prevent electrons from flowing through

• To increase the flow of electrons

What would happen if an insulator did not surround a wire carrying a current?

• The wire would break

• The current would stop flowing

• The electron flow could get directed to another conductor

• The wire would overheat

What is a short circuit?

• A circuit where electrons take a path short of the complete circuit

• A complete circuit

• A circuit with a broken path

• A circuit with no resistance