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

Question

Magnetic field lines show the direction (at every point) along which a small magnetised needle aligns. Do the magnetic field lines also represent the lines of force on a moving charge at every point? (A) No (B) Yes (C) Neither (a) nor (b) (D) Given information is not sufficient

Tardigrade Admin · Accepted Answer

No, the magnetic force is always normal to B (remember magnetic force =q v × B. It is misleading to call magnetic field lines as lines of force.

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

No

Yes

Neither (a) nor (b)

Given information is not sufficient

No, the magnetic force is always normal to $B$ (remember magnetic force $= q v \times B$ . It is misleading to call magnetic field lines as lines of force.

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

No

Yes

Neither (a) nor (b)

Given information is not sufficient

No, the magnetic force is always normal to B (remember magnetic force =qv×B. It is misleading to call magnetic field lines as lines of force.

No, the magnetic force is always normal to $B$ (remember magnetic force $= q v \times B$ . It is misleading to call magnetic field lines as lines of force.