Chapter 05: Electricity, Magnetism, and Electromagnetism Bushong: Radiologic
Science for Technologists
MULTIPLE CHOICE
1. The smallest unit of electrical charge is the .
a. electron
b. proton
c. neutron
d. neutrino
ANS: A
The smallest unit of electrical charge is the electron.
2. Electrification occurs through the movement of .
a. protons only
b. protons and electrons
c. electrons only
d. electrons and neutrons
ANS: C
Electrification occurs only through the movement of electrons.
3. Like charges and unlike charges _.
a. repel; repel
b. attract; attract
c. attract; repel
d. repel; attract
ANS: D
Like charges repel and unlike charges attract.
4. Electrostatic force is proportional to the distance between charges, and
proportional to the product of the charges. a. directly; inversely
b. inversely; directly
c. inversely; inversely
d. directly; directly
ANS: B
Electrostatic force is inversely proportional to the distance between charges, and directly
proportional to the product of the charges.
5. The charges on an electrified object are distributed .
a. in the center of the object
b. on the side nearest the charge
, c. on the topside of the object
d. evenly throughout the object
ANS: D
The charges on an electrified object are distributed evenly throughout.
6. On the surface of an electrified object, the charges concentrate on the . a.
top side
b. underside
c. sharpest curvatures
d. smoothest curvatures
ANS: C
On the surface of an electrified object, the charges concentrate on the sharpest
curvature.
7. A is a source of direct current.
a. wall socket
b. battery
c. generator
d. spark
ANS: B
A battery is a source of direct current.
8. What is the unit of electric potential?
, a. Watt
b. Amp
c. Volt
d. Ohm
ANS: C
The unit of electric potential is the volt.
9. An electric potential applied to a conductor produces a(n) . a. electric current
b. magnetic field
c. electric insulator and conductor
d. electric current and a magnetic field
ANS: D
When an electric potential is applied to a conductor, both an electric current and a
magnetic field are produced.
10. An alternating (AC) current is represented by a line.
a. sinusoidal
b. horizontal
c. vertical
d. descending
ANS: A
An alternating (AC) current is represented by a sinusoidal line.
11. A uses direct current.
Science for Technologists
MULTIPLE CHOICE
1. The smallest unit of electrical charge is the .
a. electron
b. proton
c. neutron
d. neutrino
ANS: A
The smallest unit of electrical charge is the electron.
2. Electrification occurs through the movement of .
a. protons only
b. protons and electrons
c. electrons only
d. electrons and neutrons
ANS: C
Electrification occurs only through the movement of electrons.
3. Like charges and unlike charges _.
a. repel; repel
b. attract; attract
c. attract; repel
d. repel; attract
ANS: D
Like charges repel and unlike charges attract.
4. Electrostatic force is proportional to the distance between charges, and
proportional to the product of the charges. a. directly; inversely
b. inversely; directly
c. inversely; inversely
d. directly; directly
ANS: B
Electrostatic force is inversely proportional to the distance between charges, and directly
proportional to the product of the charges.
5. The charges on an electrified object are distributed .
a. in the center of the object
b. on the side nearest the charge
, c. on the topside of the object
d. evenly throughout the object
ANS: D
The charges on an electrified object are distributed evenly throughout.
6. On the surface of an electrified object, the charges concentrate on the . a.
top side
b. underside
c. sharpest curvatures
d. smoothest curvatures
ANS: C
On the surface of an electrified object, the charges concentrate on the sharpest
curvature.
7. A is a source of direct current.
a. wall socket
b. battery
c. generator
d. spark
ANS: B
A battery is a source of direct current.
8. What is the unit of electric potential?
, a. Watt
b. Amp
c. Volt
d. Ohm
ANS: C
The unit of electric potential is the volt.
9. An electric potential applied to a conductor produces a(n) . a. electric current
b. magnetic field
c. electric insulator and conductor
d. electric current and a magnetic field
ANS: D
When an electric potential is applied to a conductor, both an electric current and a
magnetic field are produced.
10. An alternating (AC) current is represented by a line.
a. sinusoidal
b. horizontal
c. vertical
d. descending
ANS: A
An alternating (AC) current is represented by a sinusoidal line.
11. A uses direct current.
