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ID#5746 HSC Physics 1st MCQ (Sylhet 2025)

L=0.628m, A=1mm², m=20kg, l=1mm হলে ইয়ং-এর গুণাঙ্ক (Y) কত?
ক) 2.23 x 10¹¹ Nm⁻²
খ) 12.23 x 10¹¹ Nm⁻²
গ) 1.23 x 10¹¹ Nm⁻²
ঘ) 3.9 x 10¹² Nm⁻²

ব্যাখ্যা

$Y = \frac{FL}{Al} = \frac{(20 \times 9.8) \times 0.628}{10^{-6} \times 10^{-3}}$
$Y = 196 \times 0.628 \times 10^9 \approx 1.23 \times 10^{11} Nm^{-2}$।
Resource Details
Exam HSC
Subject Physics 1st paper
Chapter 7
Board Sylhet
Year 2025

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