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JEE Mains · Physics · STD 11- 8. mechanical properties of solids

तार की लम्बाईयाँ \(\ell_1\) एवं \(\ell_2\) हो जाती हैं, जब इस पर क्रमशः \(100 \mathrm{~N}\) एवं \(120 \mathrm{~N}\) तन्यता आरोपित की जाती है। यदि \(10 \ell_2=11 \ell_1\), तो तार की वास्तविक लम्बाई \(\frac{1}{\mathrm{x}} \ell_1\) होगी। यहाँ \(\mathrm{x}\) का मान___________है।

  1. A \(8\)
  2. B \(2\)
  3. C \(6\)
  4. D \(4\)
Verified Solution

Answer & Solution

Correct Answer

(B) \(2\)

Step-by-step Solution

Detailed explanation

Let the original length be ' \(\ell_0\) ' When \(T _1=100\,N\), Extension \(=\ell_1-\ell_0\) When \(T _2=120\,N\), Extension \(=\ell_2-\ell_0\) Then \(100= K \left(\ell_1-\ell_0\right)\) And \(120= K \left(\ell_2-\ell_0\right)\)…
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