What is at the center of every atom?

• Electron

• Proton

• Neutron

• Nucleus

What charge do protons have?

• Negative

• Neutral

• Positive

• No charge

What is the role of neutrons in an atom?

• They determine the atom's charge

• They hold the nucleus together

• They orbit the nucleus

• They conduct electricity

What are materials called that allow the free movement of electrons?

• Insulators

• Conductors

• Resistors

• Capacitors

How is electrical current measured?

• In Volts

• In Ohms

• In Amperes

• In Watts

What is the ability of a material to allow the movement of electricity called?

• Resistivity

• Conductivity

• Polarity

• Voltage

Which material is the best conductor of electricity?

• Copper

• Gold

• Silver

• Aluminum

What is the term for the opposition to electron flow in a material?

• Conductivity

• Voltage

• Resistivity

• Polarity

In a DC circuit, electrons flow from which pole to which pole?

• Positive to negative

• Negative to positive

• Neutral to positive

• Positive to neutral

What is the main characteristic of alternating current (AC)?

• It travels in one direction only.

• It reverses its direction constantly.

• It is stored in batteries.

• It is used only in small devices.