ExamDAO Logo

ID#5779 HSC Physics 1st MCQ (Barisal 2025)

m=1500kg এবং অসহ পীড়ন 3 x 10⁸ হলে তারের ব্যাসার্ধ কত?
ক) 1.38 x 10⁻³ m
খ) 3.24 x 10⁻³ m
গ) 3.94 x 10⁻³ m
ঘ) 4.19 x 10⁻³ m

ব্যাখ্যা

অসহ পীড়ন $= F/A = mg/(\pi r^2) \implies r = \sqrt{\frac{mg}{\pi \times \text{Stress}}}$
$r = \sqrt{\frac{1500 \times 9.8}{3.1416 \times 3 \times 10^8}} \approx 3.949 \times 10^{-3} m$।
Resource Details
Exam HSC
Subject Physics 1st paper
Chapter 7
Board Barisal
Year 2025

Discussion — HSC Physics 1st MCQ (Barisal 2025)

Join the Discussion!

You must be logged in to post a comment or ask a question.

Sign In to Comment

No discussion yet. Be the first to post a comment!