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Chapters 1 - Electricity Fundamentals

Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
 

1. 
Matter is best defined as:
a.
anything we understand.
c.
anything that occupies space.
b.
anything that is well known.
d.
anything that can be named.
 

2. 
An element cannot be:
a.
a solid.
c.
a mixture.
b.
a liquid.
d.
a gas.
 

3. 
A chemical combination of atoms is:
a.
a compound.
c.
a suspension.
b.
a mixture.
d.
an element.
 

4. 
The smallest recognizable part of a compound is called:
a.
an atom.
c.
a proton.
b.
an element.
d.
a molecule.
 

5. 
Compounds and mixtures differ in one key way:
a.
compounds are solids; mixtures are liquids.
b.
compounds are chemical combinations; mixtures are physical combinations.
c.
compounds are elements; mixtures are molecules.
d.
compounds are made from atoms; mixtures are made from elements.
 

6. 
Atoms consist of three parts called the:
a.
center, shell and nucleus.
c.
neutrons, protons and electrons.
b.
electrons, neutrons and nucleus.
d.
electrons, positrons and neutrons.
 

7. 
The atomic weight of an element is:
a.
the number of protons in the nucleus.
b.
the number of electrons in the shells.
c.
the number of protons and neutrons.
d.
the number of electrons, protons and neutrons.
 

8. 
The atomic number of an element only counts:
a.
the number of electrons.
c.
the number of protons.
b.
the number of neutrons.
d.
the number of protons and neutrons.
 

9. 
Protons carry an electrical charge that is:
a.
neutral.
c.
positive.
b.
balanced.
d.
negative.
 

10. 
Neutrons are not easily observed because they:
a.
are positively charged.
c.
are negatively charged.
b.
are almost weightless.
d.
are neutral in charge.
 

11. 
The paths that electrons follow around the nucleus are usually called:
a.
circles.
c.
shells.
b.
bands.
d.
rotations.
 

12. 
The outermost orbit of an electron is called:
a.
the energy shell.
c.
the electron band.
b.
the valance shell.
d.
the conduction band.
 

13. 
Conductors are recognized by:
a.
no electron shells.
c.
Eight electrons in the outer shell..
b.
a large number of free electrons.
d.
No neutrons in the neucleus.
 

14. 
Negatively charged atoms that have undergone ionization have:
a.
more electrons than protons.
c.
less electrons than protons.
b.
more neutrons than protons.
d.
less neutrons than protons.
 

15. 
The flow of electrons is called a/an:
a.
potential.
c.
electromotive force.
b.
voltage.
d.
current.
 

16. 
The unit of measurement of the amount of charge is called:
a.
electromotive force.
c.
voltage potential.
b.
difference in potential.
d.
coulombs.
 

17. 
Which electrical quantity is matched to its correct unit of measurement ( ):
a.
current (C) is measured in coulombs (C).
c.
current (I) is measured in amperes (A).
b.
voltage (E) is measured in amperes (A).
d.
resistance (R) is measured in insulators (I).
 

18. 
The "electrical pressure" that moves charge in a circuit is the result of the:
a.
difference of potential.
c.
voltage.
b.
electromotive force.
d.
all of these.
 

19. 
The SYMBOL and the unit of measurement ( ) for applied voltage is:
a.
R = (V).
c.
C = (V).
b.
E = (V).
d.
I = (V).
 

20. 
Electrons flow in a closed circuit because of the:
a.
current.
c.
conductors.
b.
voltage drop.
d.
difference in potential.
 

21. 
The SYMBOL and the unit of measurement for resistance is:
a.
R = ohms.
c.
R = Greek letter Omega.
b.
R = insulator.
d.
R = resistance.
 

22. 
From the Periodic Table of Elements, identify the SYMBOL for copper:
a.
C.
c.
Cu.
b.
Co.
d.
Ca.
 

23. 
From the Periodic Table of Elements, the atomic number of copper is:
a.
6.
c.
27.
b.
20.
d.
29.
 

24. 
From the Periodic Table of Elements, the SYMBOL for silver is:
a.
S.
c.
Sr.
b.
Si.
d.
Ag.
 

25. 
From the Periodic Table of Elements, the atomic number for silver is:
a.
14.
c.
28.
b.
16.
d.
47.
 

26. 
From the Periodic Table of Elements, the number of shells and valance electrons for hydrogen is:
a.
1.
c.
3.
b.
2.
d.
4.
 

27. 
In evaluating the electrical characteristics of an element, the most important is the:
a.
number of protons in nucleus.
c.
number of electrons in innermost shell.
b.
number of neutrons in nucleus.
d.
number of electrons in outermost shell.
 



 
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