Direction of the magnetic force F = q(v × B)चुंबकीय बल F = q(v × B) की दिशाDirection of the magnetic force F = q(v × B)

NCERT Fig 4.2 · Class 12 Physics · Chapter 4 · interactive diagram

Parts and what they mean

• Positive charge +q (धन आवेश +q) — Moving with velocity v inside the field B.
• Velocity v (वेग v) — Direction of motion of the charge.
• Magnetic field B (चुंबकीय क्षेत्र B) — Makes angle θ with v. Force magnitude = qvB sin θ.
• Force F = q v × B (बल F = q v × B) — Right-hand (screw) rule: turn v towards B through the smaller angle — the thumb/screw advance gives F for +q.
• Negative charge −q (ऋण आवेश −q) — Same v and B, but the charge is negative.
• Velocity v (वेग v) — Same velocity as in (a).
• Magnetic field B (चुंबकीय क्षेत्र B) — Same field as in (a).
• Force on −q (reversed) (−q पर बल (उलटा)) — For a negative charge the force is opposite to that on +q.
• Plane of v and B (v और B का तल) — F is always perpendicular to this plane.

Original diagram drawn by Simple Learning Hub, based on NCERT Fig 4.2. Report a mistake