Properties of magnetic lines of force

Which of the following statements are not true about Properties of magnetic lines of force?

  1. Magnetic lines of force start from the South Pole and end at the North Pole
  2. Magnetic lines of force never intersect.
  3. They will be maximum at the equator than at the poles

1.(i) only

2.(ii) only

3.(i), (ii) only

4.(i), (ii) only

EXPLANATION

Magnetic lines of force start from the South Pole and end at the North Pole

❌ This is NOT true.

  • Magnetic lines of force start from the North Pole and end at the South Pole outside the magnet.

  • Inside the magnet, they go from South to North, forming closed loops.

(ii) Magnetic lines of force never intersect.

✅ This is TRUE.

  • Magnetic field lines never intersect because at any given point, the magnetic field can only have one direction.

  • If they intersected, it would imply two directions of the magnetic field at one point — which is impossible.

(iii) They will be maximum at the equator than at the poles

❌ This is NOT true.

  • Magnetic field strength (and hence density of lines) is strongest at the poles, not the equator.

  • So, number of lines (density) is maximum at the poles.

Now, which statements are NOT true?

  • (i) ❌ Not true

  • (iii) ❌ Not true

  • (ii) ✅ True

✅ Final Answer:

None of the given options are fully correct, but if we assume (iii) is the third statement (even though it wasn’t numbered), then:

✅ Correct Answer: (1) (i) only is not correct in the option list, but this doesn’t match our analysis.

Instead, since (i) and (iii) are false, and (ii) is true, the right answer should be:

❌ Not listed correctly.
But if we go by what’s meant:

✔️ The correct set of not true statements is:

(i) and (iii)

Since this isn’t an exact match in your options, the correct answer should ideally be:

✅ (i) and (iii) only — but not available in your options.

 

Properties of magnetic lines of force