Test Bank For Physics for Scientists & Engineers with Modern Physics (Volume 2) 5th Edition
(Global Edition) By Douglas C. Giancoli | All 22-32 Chapters Covered With Questions And
Verified Solutions With Detailed Rationales And Case Studies.
, TABLE OF CONTENT
VI. ELECTRICITY AND MAGNETISM
22. Electric Charges and Forces
23. The Electric Field
24. Gauss's Law
25. The Electric Potential
26. Potential and Field
27. Current and Resistance
28. Fundamentals of Circuits
29. The Magnetic Field
30. Electromagnetic Induction
31. Electromagnetic Fields and Waves
32. AC Circuits
,Chapter 22 — Electric Charges and Forces
Multiple-Choice Questions
Question 1
Which statement correctly describes electric charge?
A. Electric charge is a property that determines gravitational attraction only.
B. Electric charge is a fundamental property of matter responsible for electric interactions.
C. Electric charge exists only in neutral objects.
D. Electric charge can exist only in metals.
Correct Answer: B
Rationale:
Electric charge is a fundamental property of matter. Charged particles interact through
electric forces. There are two types of charge: positive and negative.
Why the other answers are incorrect:
• A: Gravitational interaction depends on mass, not electric charge.
• C: Charged objects have a net positive or negative charge; neutral objects have
equal amounts of positive and negative charge.
• D: Charges occur in many types of matter, not just metals.
Question 2
Which statement describes the interaction between electric charges?
A. Like charges attract and unlike charges repel.
B. Like charges repel and unlike charges attract.
C. All electric charges attract each other.
D. All electric charges repel each other.
Correct Answer: B
Rationale:
Two positive charges repel, two negative charges repel, while a positive and a negative
charge attract.
Why the other answers are incorrect:
• A: This reverses the actual rule.
• C: Like charges do not attract.
, • D: Opposite charges attract.
Question 3
The SI unit of electric charge is:
A. Volt
B. Ampere
C. Coulomb
D. Ohm
Correct Answer: C
Rationale:
The coulomb (C) is the SI unit of electric charge.
Why the other answers are incorrect:
• A: Volt measures electric potential difference.
• B: Ampere measures electric current.
• D: Ohm measures electrical resistance.
Question 4
What is the magnitude of the elementary charge?
A. 1.60×10−19 C1.60\times10^{-19}\,\text{C}
B. 9.00×109 C9.00\times10^9\,\text{C}
C. 6.67×10−11 C6.67\times10^{-11}\,\text{C}
D. 1.00×10−6 C1.00\times10^{-6}\,\text{C}
Correct Answer: A
Rationale:
The magnitude of the charge of an electron or proton is:
e=1.602×10−19 Ce=1.602\times10^{-19}\text{ C}
The electron has charge −e-e, while the proton has charge +e+e.
Why the other answers are incorrect:
• B: 9.00×1099.00\times10^9 is approximately Coulomb's constant kk, not
elementary charge.
• C: 6.67×10−116.67\times10^{-11} is associated with the gravitational constant.
(Global Edition) By Douglas C. Giancoli | All 22-32 Chapters Covered With Questions And
Verified Solutions With Detailed Rationales And Case Studies.
, TABLE OF CONTENT
VI. ELECTRICITY AND MAGNETISM
22. Electric Charges and Forces
23. The Electric Field
24. Gauss's Law
25. The Electric Potential
26. Potential and Field
27. Current and Resistance
28. Fundamentals of Circuits
29. The Magnetic Field
30. Electromagnetic Induction
31. Electromagnetic Fields and Waves
32. AC Circuits
,Chapter 22 — Electric Charges and Forces
Multiple-Choice Questions
Question 1
Which statement correctly describes electric charge?
A. Electric charge is a property that determines gravitational attraction only.
B. Electric charge is a fundamental property of matter responsible for electric interactions.
C. Electric charge exists only in neutral objects.
D. Electric charge can exist only in metals.
Correct Answer: B
Rationale:
Electric charge is a fundamental property of matter. Charged particles interact through
electric forces. There are two types of charge: positive and negative.
Why the other answers are incorrect:
• A: Gravitational interaction depends on mass, not electric charge.
• C: Charged objects have a net positive or negative charge; neutral objects have
equal amounts of positive and negative charge.
• D: Charges occur in many types of matter, not just metals.
Question 2
Which statement describes the interaction between electric charges?
A. Like charges attract and unlike charges repel.
B. Like charges repel and unlike charges attract.
C. All electric charges attract each other.
D. All electric charges repel each other.
Correct Answer: B
Rationale:
Two positive charges repel, two negative charges repel, while a positive and a negative
charge attract.
Why the other answers are incorrect:
• A: This reverses the actual rule.
• C: Like charges do not attract.
, • D: Opposite charges attract.
Question 3
The SI unit of electric charge is:
A. Volt
B. Ampere
C. Coulomb
D. Ohm
Correct Answer: C
Rationale:
The coulomb (C) is the SI unit of electric charge.
Why the other answers are incorrect:
• A: Volt measures electric potential difference.
• B: Ampere measures electric current.
• D: Ohm measures electrical resistance.
Question 4
What is the magnitude of the elementary charge?
A. 1.60×10−19 C1.60\times10^{-19}\,\text{C}
B. 9.00×109 C9.00\times10^9\,\text{C}
C. 6.67×10−11 C6.67\times10^{-11}\,\text{C}
D. 1.00×10−6 C1.00\times10^{-6}\,\text{C}
Correct Answer: A
Rationale:
The magnitude of the charge of an electron or proton is:
e=1.602×10−19 Ce=1.602\times10^{-19}\text{ C}
The electron has charge −e-e, while the proton has charge +e+e.
Why the other answers are incorrect:
• B: 9.00×1099.00\times10^9 is approximately Coulomb's constant kk, not
elementary charge.
• C: 6.67×10−116.67\times10^{-11} is associated with the gravitational constant.
