JEE MAIN - Physics (2021 - 18th March Evening Shift - No. 17)
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 cannot be completely straight and confined.
(C) Magnetic field lines are completely confined within a toroid.
(D) Magnetic field lines inside a bar magnet are not parallel.
(E) $$\chi $$ = $$-$$1 is the condition for a perfect diamagnetic material, where x is its magnetic susceptibility.
Choose the correct answer from the options given below :
(A) Electric monopoles do not exist whereas magnetic monopoles exist.
(B) Magnetic field lines due to a solenoid at its ends and outside cannot be completely straight and confined.
(C) Magnetic field lines are completely confined within a toroid.
(D) Magnetic field lines inside a bar magnet are not parallel.
(E) $$\chi $$ = $$-$$1 is the condition for a perfect diamagnetic material, where x is its magnetic susceptibility.
Choose the correct answer from the options given below :
(A) and (B) only
(B) and (C) only
(C) and (E) only
(B) and (D) only
Explanation
(a) Electric monopoles exist while magnetic monopoles do not exist.
(b) Magnetic field lines at the ends and outside of solenoid cannot be confined. (c) Magnetic field lines are confined within a toroid.
(d) Magnetic field lines inside a bar magnet are parallel.
(e) For perfectly diamagnetic material $$\chi $$ = -1.
(b) Magnetic field lines at the ends and outside of solenoid cannot be confined. (c) Magnetic field lines are confined within a toroid.
(d) Magnetic field lines inside a bar magnet are parallel.
(e) For perfectly diamagnetic material $$\chi $$ = -1.
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