Which of the following statements are correct?
(A) Electric monopoles do not exist whereas magnetic monopoles exist.
(B) Magnetic field lines due to a solenoid at its ends and outside can not be completely straight and confined.
(C) Magnetic field lines are completely confined within a toroid.
(D) Magnetic field lines inside bar magnet are not parallel.
(E) χ = -1 is the condition for a perfect diamagnetic material, where χ is its magnetic susceptibility.

Choose the correct answer from the options given below:

Option 1 -

(C) and (E) only

Option 2 -

(A) and (B) only

Option 3 -

(B) and (D) only

Option 4 -

(B) and (C) only

0 1 View | Posted a month ago
Asked by Shiksha User

  • 1 Answer

  • V

    Answered by

    Vishal Baghel | Contributor-Level 10

    a month ago
    Correct Option - 3


    Detailed Solution:
    • Concept involved: Electric and magnetic field lines
    • Topic: Magnetics and Magnetic Material
    • Difficulty level: Moderate
    • Point of Error: Fact

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V
Vishal Baghel

For permanent magnetic Y is good choice, As it has very high coercivity (comparitively)

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alok kumar singh

Based on theory.

V
Vishal Baghel

M = µ? NiA
Here
µ? = Relative permeability
N = Number of turns
i = Current
A = Area of cross section
M = µ? NiA = µ? nliA
M = µ? niV = 1000 (1000) (0.5) (10? ³) = 500 = 5 × 10²Am²

A
alok kumar singh

Kindly go through the solution

 

A
alok kumar singh

Kindly go through the solution
 

 

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