Electric Current

Question 1

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 2

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 3

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

Revolt · Accepted Answer

shorter wires

Question 4

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

Revolt · Accepted Answer

long, thin

Question 5

Superconducting magnets are used in machines called particle accelerators. These machines rely on zero resistance in order to function properly.

Revolt · Accepted Answer

They are cooled to extremely low temperatures.

Question 6

Look at the diagram showing resistance and flow of electrons.

Revolt · Accepted Answer

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

Question 7

Why is copper used for most electrical wiring?

Revolt · Accepted Answer

It is a good conductor.

Question 8

Which most likely has the greatest conductivity?

Revolt · Accepted Answer

a cool silver strip

Question 9

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 10

Anton created a chart listing different types of materials.

Revolt · Accepted Answer

X: paperY: silicon

Electric Current Answers

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