3.1-3.16 Cumulative quiz

What is the smallest particle of matter that can still retain its identity?

• Atom
• Element
• Molecule

What happens when an atom loses an electron?

• It becomes a negative ion
• It becomes a positive ion
• It becomes neutral

What are ions with a negative charge called?

• Anions
• Cations
• Neutrons

How many elementary charges (protons or electrons) are in one coulomb of charge?

• 6.241 × 10¹⁸ electrons
• 1.602 × 10⁻¹⁹ electrons
• 9.109 × 10⁻³¹ electrons

What happens when a positively charged rod is brought near but does not touch an uncharged metal bar?

• Electrons are attracted to the far end
• Electrons are attracted to the near end
• Protons move toward the rod

According to Coulomb’s Law, the force between two charges is directly proportional to:

• The product of the charges and inversely proportional to distance
• The sum of charges and inversely proportional to distance
• The product of charges and directly proportional to distance

What does 1 coulomb of charge represent?

• The charge carried by 1 ampere in 1 second
• The charge carried by 1 ampere in 10 seconds
• The charge carried by 1 electron in 1 second

How is potential difference (PD) related to charge (Q) and energy (E)?

• E = PD × Q
• PD = E / Q
• Q = PD × E

What is the force responsible for the movement of electrons between two points in a circuit?

• Electromotive force
• Current
• Potential energy

What is the key effect used in photovoltaic cells to generate electricity?

• Peltier effect
• Photovoltaic effect
• Thomson effect