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A wire of a certain material is stretched slowlyby ten per cent. Its new resistance and specificresistance become respectively: [2008]
  • a)
    1.2 times, 1.3 times
  • b)
    1.21 times, same
  • c)
    both remain the same
  • d)
    1.1 times, 1.1 times
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
A wire of a certain material is stretched slowlyby ten per cent. Its n...
Resistance of a wire is given by R  l/a
If the length is increased by 10% then new
In that case, area of cross-section of wire
would decrease by 10%
∴ New area of cross-section
Thus the new resistance increases by 1.21
times. The specific resistance (resistivity)
remains unchanged as it depends on the
nature of the material of the wire.
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A wire of a certain material is stretched slowlyby ten per cent. Its new resistance and specificresistance become respectively: [2008]a)1.2 times, 1.3 timesb)1.21 times, samec)both remain the samed)1.1 times, 1.1 timesCorrect answer is option 'B'. Can you explain this answer? for Class 12 2025 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about A wire of a certain material is stretched slowlyby ten per cent. Its new resistance and specificresistance become respectively: [2008]a)1.2 times, 1.3 timesb)1.21 times, samec)both remain the samed)1.1 times, 1.1 timesCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 12 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A wire of a certain material is stretched slowlyby ten per cent. Its new resistance and specificresistance become respectively: [2008]a)1.2 times, 1.3 timesb)1.21 times, samec)both remain the samed)1.1 times, 1.1 timesCorrect answer is option 'B'. Can you explain this answer?.
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