Electricity and Magnetism Review

What is an electrical circuit?

• A device that converts electrical energy into mechanical energy.

• A type of battery used to store electrical energy.

• A closed loop or pathway that allows electric current to flow through it.

• A material that does not allow electric current to flow through it.

What is the difference between a series circuit and a parallel circuit?

• The main difference is the voltage across the components.

• The main difference is the resistance of the components.

• The main difference is the power consumption of the components.

• The main difference is how the components are connected and how the current flows.

What unit is the amount of electricity used measured in?

• volt

• amp

• watt

• kilowatt hour

What is the direction does an electrical current flow?

• There is no direction of electrical current flow

• From positive to negative terminal

• From negative to positive terminal

• From positive to positive terminal

What is a magnetic field?

• A magnetic field is a region in space where gravity can be detected.

• A magnetic field is a region in space where electric charge can be detected.

• A magnetic field is a region in space where sound waves can be detected.

• A magnetic field is a region in space where a magnetic force can be detected.

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How can you increase the strength of an electromagnetic field?

• Increase the current or increase the number of turns in the coil.

• Decrease the voltage in the circuit.

• Increase the resistance in the circuit.

• Decrease the current or decrease the number of turns in the coil.

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What is an electromagnet?

• a type of magnet that is created by heating a metal.

• a type of magnet that is only found in outer space.

• a type of magnet in which the magnetic field is produced by an electric current.

• a type of magnet that is powered by solar energy.

How does static electricity occur?

• Static electricity occurs when there is an imbalance of electric charges on the surface of an object.

• Static electricity occurs when there is a flow of electric charges on the surface of an object.

• Static electricity occurs when there is a lack of electric charges on the surface of an object.

• Static electricity occurs when two objects rub against each other.

What are conductors and insulators?

• Conductors are materials that allow the flow of electric current, while insulators are materials that do not allow the flow of electric current.

• Conductors and insulators are only used in mechanical systems, not electrical systems.

• Conductors and insulators are the same thing.

• Conductors are materials that prevent the flow of electric current, while insulators are materials that allow the flow of electric current.

Which is an example of a good conductor

• wood

• glass

• copper

• plastic