Electric Current — Quiz Answers

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Which lists types of materials from most conductive to least conductive?

A
superconductor, conductor, semiconductor, insulator
B
semiconductor, conductor, superconductor, insulator
C
conductor, insulator, semiconductor, superconductor
D
insulator, semiconductor, conductor, superconductor
3

Electric current flows through paths called circuits. People often build circuits using wires, resistors, and batteries. A battery is a voltage source. A circuit with which components has the highest current with the given voltages?

A
wires, a 1 point 5 cap v battery, no resistors
B
wires, a 1 point 5 cap v battery, a light bulb
C
wires, a 9 cap v battery, no resistors
D
wires, a 9 cap v battery, a light bulb
4

Which best explains why an electric toaster is considered a resistor?

A
It converts electric energy to another form of energy.
B
It produces an increase in voltage within the current.
C
It increases the flow of electrons.
D
It acts as a conductor.
5

Which most likely has the greatest conductivity?

A
a cool silver strip
B
a warm copper wire
C
a warm plastic rod
D
a cool rubber tube
6

Why is copper used for most electrical wiring?

A
It has low voltage.
B
It is a good conductor.
C
It has high voltage.
D
It is a good insulator.
9

Resistance depends on which three properties of a wire? Color and texture are not directly related to a wire’s resistance.

A
color, thickness, texture
B
temperature, color, texture
C
length, texture, temperature
D
thickness, length, temperature
10

What would decrease the resistance of wires carrying an electric current?

A
shorter wires
B
darker-colored wires
C
thinner wires
D
higher-temperature wires

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