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(a) Magnetic field lines show the direct...

(a) Magnetic field lines show the direction (at every point) along which a small magnetised needle aligns (at the point). Do the magnetic field lines also represent the lines of force on a moving charged particle at every point ?

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(a) Magnetic field lines do not represent lines of force because magnetic force exerted on a charged particle is not acting along the field lines but it is always directed perpendicular lines but it is always directed perpendicular by charged particle is different than the field line.
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KUMAR PRAKASHAN-MAGNETISM AND MATTER-SECTION B Numericals (Numerical From Textual Illustrations)
  1. In Fig 5.4 (b), the magnetic needle has magnetic moment 6.7 xx 10^(-2)...

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  2. A short bar magnet placed with its axis at 30° with an external field ...

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  3. (a) What happens if a bar magnet is cut into two pieces: (i) transvers...

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  4. (b) A magnetised needle in a uniform magnetic field experiences a torq...

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  5. (c) Must every magnetic configuration have a north pole and a south po...

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  6. (d) Two identical looking iron bars A and B are given, one of which is...

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  7. What is the magnitude of the equatorial and axial fields due to a bar ...

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  8. Figure shows a small magnetised needle P placed at a point 0. The arro...

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  9. Many of the diagrams given in Fig 5.7 show magnetic field lines (thick...

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  10. (a) Magnetic field lines show the direction (at every point) along whi...

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  11. (b) Magnetic field lines can be entirely confined within the core of a...

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  12. (c) If magnetic monopoles existed, how would the Gauss's law of magnet...

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  13. Does a bar magnet exert a torque on itself due to its own field '? Doe...

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  14. Magnetic field arises due to charges in motion. Can a system have magn...

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  15. The earth magnetic field at the equator is approximately 04.G. Estimat...

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  16. In the magnetic meridian of a certain place, the horizontal component ...

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  17. A solenoid has a core of a material with relative permeability 400. Th...

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  18. A domain in ferromagnetic iron is in the form of a cube of side length...

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