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प्रश्न
If the area of cross-section of a resistance wire is halved, then its resistance becomes ______.
पर्याय
one-half
two times
one-fourth
four times
MCQ
रिकाम्या जागा भरा
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उत्तर
If the area of cross-section of a resistance wire is halved, then its resistance becomes two times.
Explanation:
The resistance of a wire is inversely proportional to its area of cross-section (R ∝ `1/A`). When the area is halved, the resistance to electron flow doubles. Therefore, the new resistance becomes exactly twice its original value.
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