Q. If a copper wire is increased to double its length, its resistance will become
✅ Correct Answer: (A)
Four times
Explanation: When the wire is stretched to double the length , the area of cross section gets reduced to half. So when the wire is stretched, the resistance multiplies by four times.
Explanation by: Team MCQ Buddy
When the wire is stretched to double the length , the area of cross section gets reduced to half. So when the wire is stretched, the resistance multiplies by four times.