conductors insulators
Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
____ 1. Current is the rate at which charges move through a(n)
a. / conductor. / c. / voltage.b. / insulator. / d. / joule.
____ 2. Which of the following shows how conductors, insulators, superconductors, and semiconductors rank in order of least resistance to most resistance?
a. / superconductors, conductors, semiconductors, insulatorsb. / semiconductors, superconductors, conductors, insulators
c. / insulators, conductors, semiconductors, superconductors
d. / none of the above
____ 3. A material that does not allow a current to flow through it, but will hold a static charge is which of the following?
a. / a conductor / c. / a superconductorb. / an insulator / d. / a precious metal
____ 4. A material that has properties of a conductor under certain conditions, yet still maintains properties of an insulator under other conditions is which of the following?
a. / a conductor / c. / a semiconductorb. / an insulator / d. / a superconductor
Short Answer
5. What is the difference between a conductor and an insulator?
conductors insulators
Answer Section
MULTIPLE CHOICE
1. ANS: A DIF: 1 REF: 2 OBJ: 2
2. ANS: A DIF: 1 REF: 2 OBJ: 5
3. ANS: B
4. ANS: C
SHORT ANSWER
5. ANS:
A conductor has a low resistance because electrons can flow easily under the influence of an electric field. An insulator has a high resistance because the charges inside the insulator do not move easily.
DIF: 1 REF: 2 OBJ: 5