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ID#5788 HSC Physics 1st MCQ (Mymensingh 2025)

m = 10 gm, T = 2s হলে বল ধ্রুবকের (k) মান কত?
ক) 0.3944 Nm⁻¹
খ) 0.02465 Nm⁻¹
গ) 0.09854 Nm⁻¹
ঘ) 0.0314 Nm⁻¹

ব্যাখ্যা

আমরা জানি, $T = 2pi\sqrt{m/k} \implies k = \frac{4pi^2m}{T^2}$
$k = \frac{4 \times (3.1416)^2 \times 0.01}{2^2} \approx 0.0987 Nm^{-1}$। অপশন (গ) নিকটতম।
Resource Details
Exam HSC
Subject Physics 1st paper
Chapter 8
Board Mymensingh
Year 2025

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