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Class 10 Science Medium Mcq English Medium

If the length of a wire is doubled, keeping the area of cross-section the same, its resistance:

Question
If the length of a wire is doubled, keeping the area of cross-section the same, its resistance:
Becomes half
Remains the same
Doubles
Becomes four times
Answer
Doubles
Detailed Explanation
Since R is directly proportional to length, doubling the length doubles the resistance.
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