AnswersOC27 Physical Sci-2003310-S1-Keuten-DAquinoElectric Current

Electric Current Answers

0 verified answers3 views
1
Free Preview

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

A
insulator, semiconductor, conductor, superconductor
B
superconductor, conductor, semiconductor, insulator
C
conductor, insulator, semiconductor, superconductor
D
semiconductor, conductor, superconductor, insulator
2
Free Preview

Why is copper used for most electrical wiring?

A
It has high voltage.
B
It has low voltage.
C
It is a good conductor.
D
It is a good insulator.
3

Electric current is the flow of charged particles called ________

A
protons.
B
electrons.
C
sparks.
D
static.
4

Look at the diagram showing resistance and flow of electrons.

Question illustration
A
X: High resistanceY: Low resistanceZ: Flow of electrons
B
X: Low resistanceY: Flow of electronsZ: High resistance
C
X: Flow of electronsY: High potential energyZ: Low potential energy
D
X: Low potential energyY: High potential energyZ: Flow of electrons
5

Which most likely has the greatest conductivity?

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

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.

A
The movement of electrons is not always continuous.
B
Electrons move from areas of high to low electric potential.
C
Resistance causes current to flow.
D
The rate at which current flows is measured in ohms.
7

The chart shows the voltage of four electric currents.

Question illustration
A
Current W flows at a higher rate than Current Z.
B
Current Y flows at a lower rate than Current X.
C
Current X has a lower potential difference than Current Y.
D
Current Z has a greater potential difference than Current W.
8

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

A
They are heated to extremely high temperatures.
B
They are cooled to extremely low temperatures.
C
They are made to be very thick.
D
They are made to be very thin.
9

Measurements of two electric currents are shown in the chart.

Question illustration
A
Current X has a greater potential difference, and the charges flow at a slower rate.
B
Current Y has a greater potential difference, and the charges flow at a slower rate.
C
Current X has a greater potential difference, and the charges flow at a faster rate.
D
Current Y has a greater potential difference, and the charges flow at a faster rate.
10

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

A
It increases the flow of electrons.
B
It acts as a conductor.
C
It converts electric energy to another form of energy.
D
It produces an increase in voltage within the current.
11

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

A
short, thin
B
long, thin
C
hot, thick
D
cool, thick

Did you find these answers helpful?

More from this Course

Quiz
31 verified answers

Electric Current

Quiz
10 verified answers

Electric Current

Quiz
10 verified answers

Electric Current