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ID#5624 HSC Physics 1st MCQ (Chittagong 2025)

মেরু অঞ্চলে উক্ত সেকেন্ড দোলকের কার্যকরী দৈর্ঘ্য কত? ($g=9.83$)
ক) $3.12 m$
খ) $1.56 m$
গ) $1.49 m$
ঘ) $0.9959 m$

ব্যাখ্যা

$T = 2pi \sqrt{\frac{L}{g}} \implies L = \frac{gT^2}{4pi^2} = \frac{9.83 \times 2^2}{4 \times \pi^2} \approx 0.9959 m$।
Resource Details
Exam HSC
Subject Physics 1st paper
Chapter 8
Board Chittagong
Year 2025

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