1
JEE Main 2021 (Online) 18th March Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
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
(A) and (B) only
B
(B) and (C) only
C
(C) and (E) only
D
(B) and (D) only
2
JEE Main 2021 (Online) 16th March Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
A bar magnet of length 14 cm is placed in the magnetic meridian with its north pole pointing towards the geographic north pole. A neutral point is obtained at a distance of 18 cm from the center of the magnet. If BH = 0.4 G, the magnetic moment of the magnet is : (1G = 10$$-$$4 T)
A
2.880 $$\times$$ 102 J T$$-$$1
B
2.880 J T$$-$$1
C
2.880 $$\times$$ 103 J T$$-$$1
D
28.80 J T$$-$$1
3
JEE Main 2021 (Online) 25th February Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
In a ferromagnetic material, below the curie temperature, a domain is defined as :
A
a macroscopic region with zero magnetization.
B
a macroscopic region with saturation magnetization.
C
a macroscopic region with randomly oriented magnetic dipoles.
D
a macroscopic region with consecutive magnetic dipoles oriented in opposite direction.
4
JEE Main 2021 (Online) 24th February Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
A soft ferromagnetic material is placed in an external magnetic field. The magnetic domains :
A
may increase or decrease in size and change its orientation.
B
increase in size but no change in orientation.
C
decrease in size and changes orientation.
D
have no relation with external magnetic field.
JEE Main Subjects
EXAM MAP
Medical
NEETAIIMS
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
Defence
NDA
Staff Selection Commission
SSC CGL Tier I
CBSE
Class 12