Chapter 2: Current
MULTIPLE CHOICE
1. A(n) ____ represents the amount of current in a conductor when one coulomb of charge moves past a
point in one second.
a.
volt
c.
electron
b.
ohm
d.
ampere
2. The electrical charge (Q) carried by 6.24 x 1018 electrons represents one ____.
a.
volt
c.
coulomb
b.
ohm
d.
ampere
3. Electrical charge (Q) is measured in ____.
a.
volts
c.
coulombs
b.
ohms
d.
amperes
4. The unit of measurement for current flow is the ____.
a.
volt
c.
coulomb
b.
ohm
d.
ampere
5. When a(n) ____ exists between two charged bodies connected by a conductor, electrons will flow
along the conductor.
a.
voltage source
c.
deficiency of electrons
b.
difference of potential
d.
excess of electrons
6. The relationship between current, electrical charge, and time is represented by the formula ____.
a.
Q=I/t
c.
I=Q/t
b.
t=Q/I
d.
I=t/Q
7. ____ represent the charge carrier in an electrical circuit.
a.
Volts
c.
Electrons
b.
Ohms
d.
Amperes
8. The device that supplies electrons from one end of a conductor and removes them from the other end
of the conductor is called the ____.
a.
voltage source
c.
pump
b.
circuit
d.
terminal
9. A ____ is equal to one-thousandth (1/1000) of an ampere.
a.
nanoampere
c.
microampere
b.
picoampere
d.
milliampere
10. A ____ is equal to one-millionth (1/1,000,000) of an ampere.
a.
nanoampere
c.
microampere
b.
picoampere
d.
milliampere
COMPLETION
1. The two basic laws of ____________________ charges are that like charges repel each other and
unlike charges attract each other.
2. The amount of attracting or repelling force that acts between two electrically charged bodies depends
on two factors: their charge and the ____________________ between them.
3. As electrons move from one atom to another, they create the appearance of a positive charge, called
a(n) ______________________.
SHORT ANSWER
1. Explain why electrons can remain in orbit despite being drawn toward the positive protons in the
nucleus of an atom.
2. Describe how electrons travel in a conductor.
