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:
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
-
1 Answer
-
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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For permanent magnetic Y is good choice, As it has very high coercivity (comparitively)
Based on theory.
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
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