Helical path: velocity at an angle to Bकुंडलिनी (हेलिक्स) पथ: B से कोण पर वेगHelical path: velocity at an angle to B

NCERT Fig 4.6 · Class 12 Physics · Chapter 4 · interactive diagram

Parts and what they mean

• Uniform field B (along the axis) (एकसमान क्षेत्र B (अक्ष के अनुदिश)) — The helix winds around the direction of B.
• Charge +q (आवेश +q) — Its velocity has a part along B and a part across B.
• v∥ (component along B) (v∥ (B के अनुदिश घटक)) — Feels no force (v∥ × B = 0), so it stays constant.
• v⊥ (component across B) (v⊥ (B के लंबवत घटक)) — Gives circular motion of radius r = m v⊥/(qB).
• Helical path (कुंडलिनी पथ) — Circle + steady drift along B = helix. (Faint part = behind.)
• Pitch p (पिच p) — Distance moved along B in one revolution: p = v∥ T = 2πm v∥/(qB).
• Radius of the helix (हेलिक्स की त्रिज्या) — r = m v⊥/(qB).
• Axis of the helix (हेलिक्स की अक्ष) — Parallel to B.

Original diagram drawn by Simple Learning Hub, based on NCERT Fig 4.6. Report a mistake