Fundamentals of Electricity

Which type of current moves in two directions?

• Static current

• Direct current (DC)

• Alternating current (AC)

• Neutral current

What is a molecule of water made up of?

• Two oxygen atoms and one hydrogen atom

• Two hydrogen atoms and one oxygen atom

• One hydrogen atom and one oxygen atom

• Two nitrogen atoms and one oxygen atom

What particles orbit around the nucleus of an atom?

• Protons

• Neutrons

• Electrons

• Molecules

What is the number of protons and electrons in a hydrogen atom?

• 1

• 29

• 82

• 2

Which of the following can create the pressure needed to move electrons?

• Magnets

• Gravity

• Light

• Sound

What is an insulator?

• A chemical element that allows the easy movement of electrons

• A chemical element that does not allow the easy movement of electrons

• A positively charged particle

• A particle with no charge

What is the role of free electrons in the movement of electric current?

• They prevent the movement of electrons

• They allow electrons to move from one atom to the next

• They create a strong bond with the nucleus

• They are positively charged particles

What is the charge of a proton?

• Positive

• Negative

• Neutral

• Variable

Which subatomic particle is found in the nucleus of an atom along with protons?

• Photons

• Neutrons

• Quarks

• Electrons

What is the primary function of a resistor in an electrical circuit?

• To increase voltage

• To decrease current

• To convert AC to DC

• To store energy