MO VALLEY 1-3 TEST Comprehensive Resource To Help You
Ace 2026-2027 Exams Includes Frequently Tested Questions
With ELABORATED 100% Correct COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!! Current Update!!
Instant Download Pdf
1. Electrical current is the flow of ? .
a. electrons
b. ions
c. neutrons
d. protons - Correct Answer: a. electrons
2. Electrical current is produced when an electron from one atom knocks
electrons from another atom out of orbit.
T/F - Correct Answer: True
3. One characteristic of semiconductors is that as they are heated, their
resistance ? .
a. decreases
b. expands
c. increases
d. stays constant - Correct Answer: a. decreases
4. When a(n) ? is heated, its resistance increases.
a. conductor
b. insulator
, c. neutron
d. semiconductor - Correct Answer: a. conductor
5. The flow of electrons through a material is called ? .
a. coulomb flow
b. current
c. electricity
d. resistance - Correct Answer: b. current
6. The ? is the unit of electrical current flow.
a. ampere
b. ohm
c. volt
d. watt - Correct Answer: a.ampere
7. As electrons rotate about the nucleus, ? tries to cause them to fly off into
space.
a. a magnetic field
b. atmospheric pressure
c. centrifugal force
d. the valence shell - Correct Answer: c.centrifugal force
8. Centrifugal force tries to pull the electrons away from the nucleus and
exactly balances the force trying to pull them toward the nucleus.
T/F - Correct Answer: True
9. How many electrons are present in a copper atom?
a. 4
, b. 14
c. 23
d. 29 - Correct Answer: d.29
10.How many valence electrons are there for a copper atom?
a.1
b.3
c.4
d.8 - Correct Answer: a.1
11.Electrons revolve around the nucleus in paths called orbital rings or shells.
T/F - Correct Answer: True
12.Valence electrons are those atomic particles in the ? orbit or shell of atoms.
a. innermost
b. outermost
c. second
d. third - Correct Answer: b.outermost
13.How many valence electrons does a conductor generally have?
a. 1 or 2
b. 3 or 4
c. 5 or 6
d. 7 or 8 - Correct Answer: a.1 or 2
14.How many valence electrons does an insulator generally have?
, a. 1 or 2
b. 3 or 4
c. 5 or 6
d. 7 or 8 - Correct Answer: d.7 or 8
15.Semiconductors have ? electrons in the valence shell.
a. 2
b. 4
c. 6
d. 8 - Correct Answer: 4
16.With the exception of ? , electrical energy can produce the same effects as
those used to produce it.
a. chemical action
b. friction
c. heat
d. light - Correct Answer: b.friction
17.An atom is composed of a central nucleus surrounded by revolving ? .
a. electrons
b. neutrons
c. protons
d. valence ions - Correct Answer: a.electrons
18. Each atom will have the same number of protons and electrons.
T/F - Correct Answer: True
Ace 2026-2027 Exams Includes Frequently Tested Questions
With ELABORATED 100% Correct COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!! Current Update!!
Instant Download Pdf
1. Electrical current is the flow of ? .
a. electrons
b. ions
c. neutrons
d. protons - Correct Answer: a. electrons
2. Electrical current is produced when an electron from one atom knocks
electrons from another atom out of orbit.
T/F - Correct Answer: True
3. One characteristic of semiconductors is that as they are heated, their
resistance ? .
a. decreases
b. expands
c. increases
d. stays constant - Correct Answer: a. decreases
4. When a(n) ? is heated, its resistance increases.
a. conductor
b. insulator
, c. neutron
d. semiconductor - Correct Answer: a. conductor
5. The flow of electrons through a material is called ? .
a. coulomb flow
b. current
c. electricity
d. resistance - Correct Answer: b. current
6. The ? is the unit of electrical current flow.
a. ampere
b. ohm
c. volt
d. watt - Correct Answer: a.ampere
7. As electrons rotate about the nucleus, ? tries to cause them to fly off into
space.
a. a magnetic field
b. atmospheric pressure
c. centrifugal force
d. the valence shell - Correct Answer: c.centrifugal force
8. Centrifugal force tries to pull the electrons away from the nucleus and
exactly balances the force trying to pull them toward the nucleus.
T/F - Correct Answer: True
9. How many electrons are present in a copper atom?
a. 4
, b. 14
c. 23
d. 29 - Correct Answer: d.29
10.How many valence electrons are there for a copper atom?
a.1
b.3
c.4
d.8 - Correct Answer: a.1
11.Electrons revolve around the nucleus in paths called orbital rings or shells.
T/F - Correct Answer: True
12.Valence electrons are those atomic particles in the ? orbit or shell of atoms.
a. innermost
b. outermost
c. second
d. third - Correct Answer: b.outermost
13.How many valence electrons does a conductor generally have?
a. 1 or 2
b. 3 or 4
c. 5 or 6
d. 7 or 8 - Correct Answer: a.1 or 2
14.How many valence electrons does an insulator generally have?
, a. 1 or 2
b. 3 or 4
c. 5 or 6
d. 7 or 8 - Correct Answer: d.7 or 8
15.Semiconductors have ? electrons in the valence shell.
a. 2
b. 4
c. 6
d. 8 - Correct Answer: 4
16.With the exception of ? , electrical energy can produce the same effects as
those used to produce it.
a. chemical action
b. friction
c. heat
d. light - Correct Answer: b.friction
17.An atom is composed of a central nucleus surrounded by revolving ? .
a. electrons
b. neutrons
c. protons
d. valence ions - Correct Answer: a.electrons
18. Each atom will have the same number of protons and electrons.
T/F - Correct Answer: True
