Podcast
Questions and Answers
What is the defining characteristic of an insulator in terms of the number of free electrons in its valence shell?
What is the defining characteristic of an insulator in terms of the number of free electrons in its valence shell?
- Five to eight free electrons in its valence shell (correct)
- Two to four free electrons in its valence shell
- Thirteen to sixteen free electrons in its valence shell
- Nine to twelve free electrons in its valence shell
Why are rubber and its variants commonly used as insulators around copper wiring?
Why are rubber and its variants commonly used as insulators around copper wiring?
- Because rubber readily shares its electrons with neighboring atoms
- Because rubber has a low resistance to electrical flow
- Because rubber has a high conductivity for electrical current
- Because rubber tightly binds the electrons within the material, making them unavailable for conduction (correct)
Which of the following materials is NOT a common insulator?
Which of the following materials is NOT a common insulator?
- Copper (correct)
- Plastic
- Glass
- Wood
What is the distinguishing feature of a semiconductor in terms of the number of free electrons in its valence shell?
What is the distinguishing feature of a semiconductor in terms of the number of free electrons in its valence shell?
Which of the following elements is a compound rather than an element, but still classified as a common semiconductor material?
Which of the following elements is a compound rather than an element, but still classified as a common semiconductor material?
What property of a pure silicon crystal prevents electricity from flowing through it?
What property of a pure silicon crystal prevents electricity from flowing through it?
What effect do the strong covalent bonds in a pure silicon crystal have on its ability to conduct electricity?
What effect do the strong covalent bonds in a pure silicon crystal have on its ability to conduct electricity?
Which process is responsible for changing the behavior of silicon to allow conduction?
Which process is responsible for changing the behavior of silicon to allow conduction?
Why do neither silicon nor germanium conduct electricity in their pure form?
Why do neither silicon nor germanium conduct electricity in their pure form?
What type of material is nearly an insulator and allows very little electricity to flow through it?
What type of material is nearly an insulator and allows very little electricity to flow through it?
What material is most suitable for a rubbing connection with commutators or slip rings used in generators and alternators?
What material is most suitable for a rubbing connection with commutators or slip rings used in generators and alternators?
Which non-metal solid is mentioned as having significance as a conductor?
Which non-metal solid is mentioned as having significance as a conductor?
What creates ions in some liquids when current is passed through them?
What creates ions in some liquids when current is passed through them?
What are groups of atoms called that are ionized in a liquid?
What are groups of atoms called that are ionized in a liquid?
Which type of ions move in opposite directions in a liquid?
Which type of ions move in opposite directions in a liquid?
What is the defining characteristic of an insulator?
What is the defining characteristic of an insulator?
How do insulators differ from conductors in terms of electron flow?
How do insulators differ from conductors in terms of electron flow?
Why does a positive ion in an insulator try to attract electrons from surrounding atoms?
Why does a positive ion in an insulator try to attract electrons from surrounding atoms?
Which material is most commonly used as an insulator?
Which material is most commonly used as an insulator?
What happens when a positive force is applied to an insulator?
What happens when a positive force is applied to an insulator?
In which form does carbon act as an electrical insulator?
In which form does carbon act as an electrical insulator?
Which element has the most common semiconductor element in the world?
Which element has the most common semiconductor element in the world?
Why are metals good conductors of electricity?
Why are metals good conductors of electricity?
Which material conducts electricity but not as well as metals like copper or gold?
Which material conducts electricity but not as well as metals like copper or gold?
What atomic structure allows silicon and germanium to have good semiconductor properties?
What atomic structure allows silicon and germanium to have good semiconductor properties?
Which type of compound dissociates completely into charged atoms or molecules when dissolved in water?
Which type of compound dissociates completely into charged atoms or molecules when dissolved in water?
Why are compounds with weak conductivity considered poor conductors of electricity?
Why are compounds with weak conductivity considered poor conductors of electricity?
What characterizes the atoms of commonly used conductors such as copper, silver, gold, and aluminium?
What characterizes the atoms of commonly used conductors such as copper, silver, gold, and aluminium?
What type of compound is acetic acid in terms of electrical conductivity?
What type of compound is acetic acid in terms of electrical conductivity?
Why do compounds with strong conductivity have greater conductivity when the concentration of ions is higher?
Why do compounds with strong conductivity have greater conductivity when the concentration of ions is higher?
What is the common misconception about the conductivity of water?
What is the common misconception about the conductivity of water?
What happens to the conductivity of compounds when they become liquid at high temperatures?
What happens to the conductivity of compounds when they become liquid at high temperatures?
Why does ethanol behave as an insulator?
Why does ethanol behave as an insulator?
What makes potassium chloride (KCl) a good conductor when dissolved in water?
What makes potassium chloride (KCl) a good conductor when dissolved in water?
Why do non-ionic compounds not conduct electricity?
Why do non-ionic compounds not conduct electricity?
How can a simple circuit with a light bulb be used to test the conductivity of aqueous compounds?
How can a simple circuit with a light bulb be used to test the conductivity of aqueous compounds?
What defines an electrolyte?
What defines an electrolyte?
Flashcards are hidden until you start studying
