CL.5 BK.2-3-Closed Circuits

What is a closed circuit?

• A closed circuit is a circuit that has multiple paths for current to flow.

• A closed circuit is a type of circuit that only works with batteries.

• A closed circuit is an electrical circuit that is open and does not allow current to flow.

• A closed circuit is an electrical circuit that is complete and allows current to flow.

What happens to a bulb in a closed circuit?

• The bulb remains off.

• The bulb explodes.

• The bulb lights up.

• The bulb flickers intermittently.

How does a switch control electricity flow?

• A switch increases voltage to control electricity flow.

• A switch opens or closes a circuit to control electricity flow.

• A switch acts as a battery to generate electricity.

• A switch diverts electricity to multiple circuits without interruption.

What are materials that allow electricity to flow called?

• Semiconductors

• Insulators

• Conductors

• Dielectrics

Name two examples of conductors.

• Copper, Aluminum

• Plastic

• Rubber

• Wood

What are insulators?

• Substances that only conduct electricity but not heat.

• Items that are used to store electrical energy.

• Insulators are materials that resist the flow of electricity and heat.

• Materials that enhance the flow of electricity and heat.

Give two examples of insulators.

• Rubber, Glass

• Copper

• Iron

• Aluminum

Why is plastic used in electrical appliances?

• Plastic is primarily used for its weight and cost-effectiveness.

• Plastic is used for its conductivity in electrical appliances.

• Plastic is chosen for its ability to conduct heat efficiently.

• Plastic is used in electrical appliances for its insulating properties, durability, and versatility in design.

What can happen if we do not use electricity safely?

• Using electricity can improve health and well-being.

• Electricity is always safe if used indoors.

• Improper use of electricity can lead to better energy efficiency.

• Unsafe use of electricity can result in electrical shocks, fires, and damage to property.

What should we do if cables or appliances are damaged?

• Ignore the damage and continue using the item.

• Unplug the damaged item, assess the damage, repair if minor, or replace if severe.

• Use the damaged appliance only when necessary.

• Wrap the damaged cables in tape and store them away.