Conductors and Insulators

Front

A material that lets electricity pass through it is called ...

Back

an electrical conductor

Front

A material that does NOT let electricity pass through it is called ...

Back

an electrical insulator

Front

Which of the following materials is an electrical conductor?
Options: silver, silver-colored plastic, cork, rubber

Back

silver

Front

Which of the following materials is an electrical insulator? Options: aluminum, gold, rubber, steel

Back

rubber

Front

In which circuit will the bulb or bulbs glow brightest? Options: A simple circuit with one bulb and one battery, A simple circuit with one bulb and two batteries, A simple circuit with two bulbs and one battery

Back

A simple circuit with one bulb and two batteries

Front

Why is a bulb brighter when it is powered by two batteries rather than one?

Back

Because the flow of electricity in the circuit is greater

Front

How can Ruby make the bulbs dimmer in a series circuit with two bulbs and two batteries? Options: Replace one of the batteries with a section of wire, Replace one of the batteries with a cork, Replace one of the bulbs with a section of wire

Back

Replace one of the batteries with a section of wire

Front

Why does the bulb in Ruby's simple circuit with one bulb and three batteries light for an instant and then go out?

Back

Too much electricity flows through the bulb's filament

Front

Why is electrical wiring usually made from copper?

Back

Because copper conducts electricity

Front

Why is electrical wiring usually covered with a layer of plastic?

Back

To make it safe