Halving the cross sectional area of a conductor does what to its resistance?
ACubes it
BDoubles it
CHalves it
DCancels it
Answer & Solution
Correct answer: B. Doubles it
1. A narrower conductor gives the charge less room.
2. Resistance is inversely proportional to the area.
3. Halving the area of the cross-section of a conductor doubles the resistance.
4. So the answer is doubles it.
_Source: syllabus Physics, Ch 3 'Current Electricity'_
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