Electric Current

Question 1

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

Revolt · Accepted Answer

superconductor, conductor, semiconductor, insulator

Question 2

The chart shows the voltage of four electric currents.

Revolt · Accepted Answer

Current X has a lower potential difference than Current Y.

Question 3

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

Revolt · Accepted Answer

thickness, length, temperature

Question 4

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

Revolt · Accepted Answer

It converts electric energy to another form of energy.

Question 5

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

Revolt · Accepted Answer

shorter wires

Question 6

Measurements of two electric currents are shown in the chart.

Revolt · Accepted Answer

Current Y has a greater potential difference, and the charges flow at a slower rate.

Question 7

In the diagram, the arrow shows the movement of electric charges through a wire connected to a battery.

Revolt · Accepted Answer

a difference in electric potential

Question 8

Jodi made a list about electric current to help her study for a test.1) Movement of electrons is continuous in a current.2) Electrons move from areas of low to high electric potential.3) Voltage causes current to flow.4) Rate at which current flows is measured in amperes.

Revolt · Accepted Answer

Electrons move from areas of high to low electric potential.

Question 9

Look at the diagram showing resistance and flow of electrons.

Revolt · Accepted Answer

X: Low potential energyY: High potential energyZ: Flow of electrons

Question 10

Which two wire properties would provide the greatest resistance to the flow of a current?

Revolt · Accepted Answer

long, thin

Electric Current Answers

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