Atomic Structure, Electric Charge, and Circuits Assessment

Which statement best explains how a neutral atom becomes charged?

• By gaining or losing protons
• By gaining or losing electrons
• By gaining or losing both protons and electrons
• By changing its atomic number

What happens to the electric force between two charged particles as the distance between them increases?

• The force increases linearly
• The force remains constant
• The force decreases
• The force becomes zero instantly

In an atom with 8 protons and 6 electrons, what is its overall charge?

• Neutral
• Positive (+2)
• Negative (-2)
• Cannot be determined

Electric field lines around a positively charged object point:

• Toward the object
• Away from the object
• Parallel to the object
• In random directions

What determines the strength of an electric force between charged particles?

• Only the distance between particles
• Only the number of charges
• Both distance and number of charges
• The temperature of the particles

Which statement about current flow is correct?

• Electrons flow from positive to negative
• Current flows from negative to positive
• Current flows from positive to negative
• Electrons and current flow in the same direction

What is voltage best described as?

• The speed of electrons
• The electric potential difference between two points
• The number of electrons in a circuit
• The resistance in a circuit

Why can't a neutral atom become charged by losing protons?

• Protons are too large
• It would change the element identity
• Protons have no charge
• Protons move freely

When a balloon is rubbed against a wall, the wall becomes positively charged because:

• It gains protons
• It loses electrons
• It gains electrons
• It loses protons

Which component in a circuit converts chemical energy to electrical energy?

• Resistor
• Switch
• Battery
• Wire