ExamDAO Logo

ID#5733 HSC Physics 1st MCQ (Jessore 2025)

P = 2i + 3j - k এবং Q = -4i + mj + 4k ভেক্টর দুটি লম্ব হবে যখন m = ?
ক) 12
খ) 10
গ) 8
ঘ) 4

ব্যাখ্যা

লম্ব হওয়ার শর্ত: $\vec{P} \cdot \vec{Q} = 0$
$(2)(-4) + (3)(m) + (-1)(4) = 0 \implies -8 + 3m - 4 = 0 \implies 3m = 12 \implies m = 4$।
Resource Details
Exam HSC
Subject Physics 1st paper
Chapter 2
Board Jessore
Year 2025

Discussion — HSC Physics 1st MCQ (Jessore 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!