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A material that lets electricity pass through it is called ...
an electrical conductor
an electrical insulator
an electrical appliance
A material that does NOT let electricity pass through it is called ...
Which of the following materials is an electrical conductor?
Which of the following materials is an electrical insulator?
In which circuit will the bulb or bulbs glow brightest?
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
Why is a bulb brighter when it is powered by two batteries rather than one?
Because the flow of electricity in the circuit is less
Because the flow of electricity in the circuit is the same
Because the flow of electricity in the circuit is greater
Ruby has connected two bulbs across two batteries in a simple circuit. How can she make the bulbs dimmer?
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
Ruby makes a complete simple circuit with one bulb and three batteries. The bulb lights for an instant and then goes out. Why?
Not enough electricity flows around the circuit
Too much electricity flows through the bulb's filament
The batteries are flat
Why is electrical wiring usually made from copper?
Because copper is shiny
Because copper conducts electricity
Because copper is not magnetic
Why is electrical wiring usually covered with a layer of plastic?
To make it look pretty
To help electricity flow along the wire
To make it safe