Subatomic Particles and Conductors

This video tutorial covers module 26, focusing on the introduction to electrical circuits. It begins with an overview of atomic structure, detailing the components of an atom such as protons, electrons, and neutrons. The tutorial explains the concept of valence shells and how atoms form ions by gaining or losing electrons. It further explores the characteristics of conductors, insulators, and semiconductors based on their valence electrons. The video also discusses magnetism, magnetic fields, and the creation of electromagnets in electrical circuits. Finally, it includes a review section with key concepts and practice questions.

What are the three main subatomic particles found in an atom?

• Protons, Neutrons, and Photons

• Protons, Electrons, and Photons

• Electrons, Photons, and Neutrons

• Protons, Neutrons, and Electrons

What happens to an atom with a valence shell that has fewer electrons?

• It is likely to lose electrons

• It is likely to gain electrons

• It becomes a proton

• It becomes a neutron

What is an ion?

• An atom that has gained or lost neutrons

• An atom that has gained or lost electrons

• An atom that has gained or lost protons

• An atom that has gained or lost photons

Which type of material has three or fewer valence electrons and easily transfers electrons?

• Superconductor

• Semiconductor

• Conductor

• Insulator

What is the characteristic of a semiconductor in terms of valence electrons?

• It has four valence electrons

• It has six valence electrons

• It has five valence electrons

• It has three valence electrons

What creates a magnetic field in an electrical circuit?

• An electric current

• A moving insulator

• A static charge

• A stationary conductor

What is produced when a conductor is coiled around an iron bar?

• A turbine

• An electromagnet

• An insulator

• A capacitor

Which of the following repels an electron?

• Proton

• Photon

• Negative ion

• Neutron

An atom with seven valence electrons is most likely to be what?

• An insulator

• A conductor

• A semiconductor

• A superconductor

What is produced when current flows through a conductor coiled around an iron bar?

• An insulator

• A turbine

• A capacitor

• An electromagnet