Parabola Construction | General Method | Tangent & Normal | Engineering Graphics

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🧠 What you will learn in this video 📚

🔹 पैराबोला क्या है और इसकी Eccentricity = 1 का मतलब
🔹 Directrix, Focus, Axis और Vertex का सही कॉन्सेप्ट
🔹 General / Eccentricity Method से Parabola का Construction
🔹 Vertex को locate करने की आसान ट्रिक (Mid-point concept)
🔹 Step-by-step Parabola plotting (10 mm interval technique)
🔹 Smooth curve sketch करने की सही hand-movement technique
🔹 Parabola पर किसी भी point पर Tangent और Normal कैसे बनाएं
🔹 Exam-oriented tips (Bar error से marks कैसे बचाएं)

🛠️ Topics Covered 🧩

📌 Definition of Parabola (Focus–Directrix property)
📌 Meaning of Eccentricity (e = 1)
📌 Location of Focus, Directrix & Vertex
📌 Construction using arcs (C1, C2, C3… method)
📌 Curve drawing technique (Forearm & wrist control)
📌 Tangent & Normal construction at any point

🎯 Who should watch this video?

👨‍🎓 Class 11 & 12 students
👨‍🏫 Engineering Graphics learners
🧑‍🎓 Diploma / Polytechnic students
📝 Competitive exam aspirants (DSSSB, KVS, etc.)
👉 This video is useful for students of the following Indian Technical / Engineering Universities:

🏛️ Central & National Level

🔹 IITs (All Indian Institutes of Technology)
🔹 NITs (All National Institutes of Technology)
🔹 IIITs (Indian Institutes of Information Technology)
🔹 Central Universities offering B.Tech

🏫 State Technical Universities (Major Coverage)

🔹 JNTU (Hyderabad / Kakinada / Anantapur)
🔹 SPPU – Savitribai Phule Pune University
🔹 RGPV – Rajiv Gandhi Proudyogiki Vishwavidyalaya
🔹 CSVTU – Chhattisgarh Swami Vivekanand Technical University
🔹 MU – Mumbai University
🔹 AKTU / UPTU – Dr. A.P.J. Abdul Kalam Technical University
🔹 VTU – Visvesvaraya Technological University
🔹 GTU – Gujarat Technological University
🔹 WBUT / MAKAUT – West Bengal
🔹 BPUT – Biju Patnaik University of Technology
🔹 PTU – Punjab Technical University
🔹 RTU – Rajasthan Technical University
🔹 KTU / APJAKTU – Kerala Technological University
🔹 Anna University – Tamil Nadu
🔹 Osmania University – Telangana
🔹 MSBTE / DBATU – Maharashtra Technical Education
🔹 HPTU – Himachal Pradesh Technical University
🔹 UTU – Uttarakhand Technical University
🔹 JUT – Jharkhand University of Technology
🔹 SCTEVT – Odisha (Diploma + Degree relevance)

📌 Applicable to almost all Indian universities where Engineering Graphics / Technical Drawing is part of B.Tech curriculum.

💡 Why this video is important?

✔ Conceptual + Construction clarity
✔ Suitable for exam as well as teaching
✔ No shortcut confusion – pure geometry logic
✔ One-time understanding of Parabola

📝 Important Exam Tip ⚠️

✍️ Curve को “Bar” मत लिखो
✅ Correct notation: P₁, P₂, P₃…
👉 Teachers marks काटते हैं bar notation पर

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