Answer:
The correct option is b) half
Reason:
Resistance is inversaly proportional to (A) Area (cross sectionsl area of conductor) .
R∝ 1/A
So when A Doubled then Resistance became half .
Q30. When the area of cross-section of a conductor is doubled, its resistance becomes: a) Double b) Half c) Four times d) One-fourth
Q30. When the area of cross-section of a conductor is doubled, its resistance becomes: a) Double b) Half c) Four times d) One-fourth