Multiple Choice
The current density is the same in two wires.Wire A has twice the free electron concentration of wire B.The drift speed of electrons in A is:
A) twice that of electrons in B
B) four times that of electrons in B
C) half that of electrons in B
D) one-fourth that of electrons in B
E) the same as that of electrons in B
Correct Answer:

Verified
Correct Answer:
Verified
Q12: A current of 0.3 A passes through
Q13: A 1.5-V battery is connected to a
Q14: Copper contains 8.4 *10<sup>28</sup> free electrons per
Q15: For an ohmic resistor, resistance is the
Q16: The units of resistivity are:<br>A)ohm<br>B)ohm·meter<br>C)ohm/meter<br>D)ohm/meter<sup>2</sup><br>E)none of these
Q18: A wire is 1 m long
Q19: A student kept her 60-watt, 120-volt study
Q20: In a conductor carrying a current we
Q21: Current has units:<br>A)kilowatt·hour<br>B)coulomb/second<br>C)coulomb<br>D)volt<br>E)ohm
Q22: A certain resistor dissipates 0.5 W when