Multiple Choice
The length of a certain wire is doubled and at the same time its radius is also doubled. What is the change in the resistance of this wire?
A) It stays the same.
B) It is doubled.
C) It is quadrupled.
D) It is reduced by a factor of 2.
E) It is reduced by a factor of 4.
Correct Answer:

Verified
Correct Answer:
Verified
Q15: The resistivity of the material of a
Q16: FIGURE 21-10 <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB6213/.jpg" alt="FIGURE 21-10
Q18: Four unequal resistors are connected in a
Q20: The resistivity of a 1.0 m long
Q21: Four 20. Ω resistors are connected in
Q22: Given 3 capacitors:<br> 4.00 μF, 7.00 μF,
Q23: Which one of the following is a
Q24: The length of a certain wire is
Q40: A simple circuit has a total resistance
Q221: Kirchhoff's junction rule is a statement of<br>A)the