Understanding Electricity

What are the three main particles that make up an atom?

• Protons, Photons, Electrons

• Electrons, Photons, Neutrons

• Protons, Neutrons, Photons

• Protons, Neutrons, Electrons

Which type of material allows electrons to flow freely?

• Semiconductors

• Resistors

• Conductors

• Insulators

What is the role of voltage in an electrical circuit?

• It measures the resistance

• It pushes electrons through the circuit

• It stores electrical energy

• It measures the current flow

How is current measured in a circuit?

• In ohms

• In volts

• In amperes

• In watts

What happens to resistance when the length of a wire increases?

• Resistance becomes zero

• Resistance remains the same

• Resistance increases

• Resistance decreases

What is the purpose of a resistor in a circuit?

• To decrease current

• To increase voltage

• To restrict the flow of electrons

• To store electrical energy

How can the strength of a magnetic field be increased in a coil?

• By increasing the current

• By reducing the voltage

• By decreasing the number of turns

• By using a plastic core

What is the primary function of a transformer?

• To measure current

• To change voltage levels

• To convert AC to DC

• To store electrical energy

What is a key characteristic of alternating current (AC)?

• It flows in one direction

• It flows back and forth

• It is used only in batteries

• It cannot be converted to DC

Why do homes typically use AC power instead of DC?

• AC is more efficient for small devices

• AC is safer than DC

• AC is easier to generate

• AC can be easily transformed to different voltages