1

JEE Main 2019 (Online) 8th April Evening Slot

MCQ (Single Correct Answer)

+4

-1

Two magnetic dipoles X and Y are placed at
a separation d, with their axes perpendicular to
each other. The dipole moment of Y is twice
that of X. A particle of charge q is passing,
through their midpoint P, at angle q = 45° with
the horizontal line, as shown in figure. What
would be the magnitude of force on the particle
at that instant ?

(d is much larger than the dimensions of the dipole)

(d is much larger than the dimensions of the dipole)

2

JEE Main 2019 (Online) 12th January Evening Slot

MCQ (Single Correct Answer)

+4

-1

A paramagnetic material has 10

^{28}atoms/m^{3}. Its magnetic susceptibility at temperature 350 K is 2.8 $$ \times $$ 10^{–4}. Its susceptibility at 300 K is :3

JEE Main 2019 (Online) 11th January Evening Slot

MCQ (Single Correct Answer)

+4

-1

A paramagnetic substance in the form of a cube with sides 1 cm has a magnetic dipole moment of 20 $$ \times $$ 10

^{–6}J/ T when a magnetic intensity of 60 $$ \times $$ 10^{3}A/m is applied. Its magnetic susceptibility is4

JEE Main 2019 (Online) 10th January Evening Slot

MCQ (Single Correct Answer)

+4

-1

Out of Syllabus

At some location on earth, the horizontal component of earth’s magnetic field is 18 × 10

^{–6}T. At this location, magnetic needle of length 0.12 m and pole strength 1.8 Am is suspended from its mid-point using a thread, it makes 45^{o}angle with horizontal in equilibrium. To keep this needle horizontal, the vertical force that should be applied at one of its ends is -Questions Asked from Magnetic Properties of Matter (MCQ (Single Correct Answer))

Number in Brackets after Paper Indicates No. of Questions

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