Physics electric
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29 Terms
Q: Which subatomic particle is responsible for charge transfer?
A: Electrons (they are the only particles that can move)
Q: Why don’t protons move?
A: They are tightly bound in the nucleus by the strong nuclear force
Q: What happens when an object gains electrons?
A: It becomes negatively charged
Q: What happens when an object loses electrons?
A: It becomes positively charged
Q: What is a neutral object?
A: Equal number of protons and electrons
Q: What is a net negative charge?
A: More electrons than protons
Q: What is a net positive charge?
A: Fewer electrons than protons
Q: What happens between different charges?
A: They attract (+ and −)
Q: What happens between like charges?
A: They repel (+/+ or −/−)
Q: How does a neutral object interact with charged objects?
A: It is attracted to both positive and negative charges
Q: What happens when two charged objects touch and separate?
A: They share the total charge equally
Q: What is the goal of electron transfer between objects?
A: To reach neutrality (balance of charge)
Q: What does conservation of charge state?
A: Charge cannot be created or destroyed, only transferred
Q: What happens to total charge in a system?
A: It remains constant
Q: What is the elementary charge (e)?
A: The charge of one proton or electron
Q: Charge of a proton?
A: +1e or +1.6 × 10⁻¹⁹ C
Q: Charge of an electron?
A: −1e or −1.6 × 10⁻¹⁹ C
Q: What is 1 Coulomb equal to?
A: 6.25 × 10¹⁸ elementary charges
Q: What is 1 elementary charge in Coulombs?
A: 1.6 × 10⁻¹⁹ C
Q: What rule applies to net charge on objects?
A: It must be a whole number multiple of e
Q: Why can’t you have 6.25e charge?
A: You can’t have fractions of electrons or protons
Q: What does Coulomb’s Law calculate?
A: The electrostatic force between two charges
Q: Coulomb’s Law equation?
Fe= kq1q2/r²
Q: What does k represent?
A: Electrostatic constant = 8.99 × 10⁹ N·m²/C²
Q: What units must charge be in for Coulomb’s Law?
A: Coulombs (C)
Q: How does distance affect force?
A: Inverse square relationship (as r ↑, F ↓)
Q: Are forces between two charges equal?
A: Yes, equal in magnitude and opposite in direction
Q: What does a negative force value mean?
A: Attraction
Q: What does a positive force value mean?
A: Repulsion