Question

Which of the following statements are correct?

1. Electric monopoles do not exist whereas magnetic monopoles exist.
2. Magnetic field lines due to a solenoid at its ends and outside cannot be completely straight and confined.
3. Magnetic field lines are completely confined within a toroid.
4. Magnetic field lines inside a bar magnet are not parallel.
5. χ = -1 is the condition for a perfect diamagnetic material, where x is its magnetic susceptibility.

Options

• (C) and (E) only

• (B) and (C) only

• (B) and (D) only

• (A) and (B) only

Answer 1

(C) and (E) only

Explanation:

A toroid's magnetic field lines are entirely constrained, and the magnetic susceptibility of a perfect diamagnetic material is given by χ = - 1.