PHYS 1260 Final Exam/ All Practice Exam Questions
with Correct Verified Answers – Rated A+
1. Electrostatics is a branch of electricity that focuses on:
A. Electrical charge only
B. Electrical force only
C. Both electrical charge and electrical force when static
D. Electrical current only
Answer: C
Rationale: Electrostatics deals with electric charges at rest and
the forces they exert on each other. It encompasses both the
study of electrical charge and the resulting electrical forces,
specifically when charges are not in motion .
2. In an electrically neutral atom, the number of protons in the
nucleus is equal to the number of:
A. Electrons that surround the nucleus
B. Neutrons in the nucleus
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,C. Both electrons and neutrons
D. Neither electrons nor neutrons
Answer: A
Rationale: Electrical neutrality in an atom requires that the
positive charge of protons equals the negative charge of
electrons. The number of protons matches the number of orbiting
electrons .
3. The pair of protons in the nucleus of a helium atom:
A. Attract a pair of orbiting electrons
B. Repel orbiting electrons
C. Both attract and repel orbiting electrons
D. Neither attract nor repel orbiting electrons
Answer: A
Rationale: Protons are positively charged and attract negatively
charged electrons, holding them in orbit. The attractive electrical
force between opposite charges keeps the atom together .
2
,4. Two protons attract each other gravitationally and repel each
other electrically. The stronger of these two forces is:
A. Gravitational
B. Electrical
C. Neither
D. Both are equal
Answer: B
Rationale: The electrical force between protons is approximately
10^36 times stronger than the gravitational force. While gravity
acts on all masses, the electrical force dominates at atomic
scales .
5. The unit of electric charge, the coulomb, is the charge on:
A. A single electron
B. A specific large number of electrons
C. A neutron
D. A specific number of neutrons
3
, Answer: B
Rationale: One coulomb is the charge of approximately 6.24 ×
10^18 electrons (or protons). It represents a very large number
of elementary charges .
6. Fundamental charge (e) is equal to:
A. 1.6 × 10^19 C
B. 1.6 × 10^-19 C
C. 6.24 × 10^18 C
D. 9.11 × 10^-31 C
Answer: B
Rationale: The fundamental charge of an electron or proton is 1.6
× 10^-19 coulombs. This is the smallest unit of charge that exists
independently .
7. When the distance between two charges is halved, the
electrical force between them:
A. Is reduced by 1/4
B. Halves
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with Correct Verified Answers – Rated A+
1. Electrostatics is a branch of electricity that focuses on:
A. Electrical charge only
B. Electrical force only
C. Both electrical charge and electrical force when static
D. Electrical current only
Answer: C
Rationale: Electrostatics deals with electric charges at rest and
the forces they exert on each other. It encompasses both the
study of electrical charge and the resulting electrical forces,
specifically when charges are not in motion .
2. In an electrically neutral atom, the number of protons in the
nucleus is equal to the number of:
A. Electrons that surround the nucleus
B. Neutrons in the nucleus
1
,C. Both electrons and neutrons
D. Neither electrons nor neutrons
Answer: A
Rationale: Electrical neutrality in an atom requires that the
positive charge of protons equals the negative charge of
electrons. The number of protons matches the number of orbiting
electrons .
3. The pair of protons in the nucleus of a helium atom:
A. Attract a pair of orbiting electrons
B. Repel orbiting electrons
C. Both attract and repel orbiting electrons
D. Neither attract nor repel orbiting electrons
Answer: A
Rationale: Protons are positively charged and attract negatively
charged electrons, holding them in orbit. The attractive electrical
force between opposite charges keeps the atom together .
2
,4. Two protons attract each other gravitationally and repel each
other electrically. The stronger of these two forces is:
A. Gravitational
B. Electrical
C. Neither
D. Both are equal
Answer: B
Rationale: The electrical force between protons is approximately
10^36 times stronger than the gravitational force. While gravity
acts on all masses, the electrical force dominates at atomic
scales .
5. The unit of electric charge, the coulomb, is the charge on:
A. A single electron
B. A specific large number of electrons
C. A neutron
D. A specific number of neutrons
3
, Answer: B
Rationale: One coulomb is the charge of approximately 6.24 ×
10^18 electrons (or protons). It represents a very large number
of elementary charges .
6. Fundamental charge (e) is equal to:
A. 1.6 × 10^19 C
B. 1.6 × 10^-19 C
C. 6.24 × 10^18 C
D. 9.11 × 10^-31 C
Answer: B
Rationale: The fundamental charge of an electron or proton is 1.6
× 10^-19 coulombs. This is the smallest unit of charge that exists
independently .
7. When the distance between two charges is halved, the
electrical force between them:
A. Is reduced by 1/4
B. Halves
4
