Podcast
Questions and Answers
Which type of materials allow charges to pass through them easily?
Which type of materials allow charges to pass through them easily?
What materials are considered non-conductors?
What materials are considered non-conductors?
Which type of elements have properties of both metals and nonmetals?
Which type of elements have properties of both metals and nonmetals?
What do free electrons in a metal allow the metal to do?
What do free electrons in a metal allow the metal to do?
Signup and view all the answers
What are the positive and negative ions in a battery responsible for?
What are the positive and negative ions in a battery responsible for?
Signup and view all the answers
What type of materials have the ability to behave as either a conductor or an insulator under specific conditions?
What type of materials have the ability to behave as either a conductor or an insulator under specific conditions?
Signup and view all the answers
If a conductor is 40 meters long and has a resistance of 10 ohms, what would be the resistance of a conductor of the same material and diameter, but 80 meters long?
If a conductor is 40 meters long and has a resistance of 10 ohms, what would be the resistance of a conductor of the same material and diameter, but 80 meters long?
Signup and view all the answers
Among the materials listed in Table 2, which material has the highest resistance per 100m length with a 1 mm2 cross-sectional area?
Among the materials listed in Table 2, which material has the highest resistance per 100m length with a 1 mm2 cross-sectional area?
Signup and view all the answers
Why is gold often used to plate contacts and connectors despite having higher resistance than copper?
Why is gold often used to plate contacts and connectors despite having higher resistance than copper?
Signup and view all the answers
Which material is suitable for wiring due to low resistance, low cost, fair resistance to corrosion, and good flexibility?
Which material is suitable for wiring due to low resistance, low cost, fair resistance to corrosion, and good flexibility?
Signup and view all the answers
Among silver, gold, and aluminum, which material is known to be very suitable for relay contacts and printed circuit boards due to its low resistance?
Among silver, gold, and aluminum, which material is known to be very suitable for relay contacts and printed circuit boards due to its low resistance?
Signup and view all the answers
Why is tungsten practical for bulb elements even though it has higher resistance compared to other materials?
Why is tungsten practical for bulb elements even though it has higher resistance compared to other materials?
Signup and view all the answers
Which type of material has a positive temperature coefficient of resistance?
Which type of material has a positive temperature coefficient of resistance?
Signup and view all the answers
What type of material has a negative temperature coefficient of resistance?
What type of material has a negative temperature coefficient of resistance?
Signup and view all the answers
Which material would be suitable for heating elements due to its properties?
Which material would be suitable for heating elements due to its properties?
Signup and view all the answers
What type of conductor would have high resistance as wires?
What type of conductor would have high resistance as wires?
Signup and view all the answers
What is the sign of the temperature coefficient of resistance for materials like silver and copper?
What is the sign of the temperature coefficient of resistance for materials like silver and copper?
Signup and view all the answers
Which type of material is commonly used in most automotive temperature sensors?
Which type of material is commonly used in most automotive temperature sensors?
Signup and view all the answers
