1
JEE Main 2022 (Online) 29th June Morning Shift
+4
-1
Out of Syllabus At a certain place the angle of dip is 30$$^\circ$$ and the horizontal component of earth's magnetic field is 0.5 G. The earth's total magnetic field (in G), at that certain place, is :

A
$${1 \over {\sqrt 3 }}$$
B
$${1 \over 2}$$
C
$$\sqrt 3$$
D
1
2
JEE Main 2022 (Online) 28th June Evening Shift
+4
-1 The space inside a straight current carrying solenoid is filled with a magnetic material having magnetic susceptibility equal to 1.2 $$\times$$ 10$$-$$5. What is fractional increase in the magnetic field inside solenoid with respect to air as medium inside the solenoid?

A
1.2 $$\times$$ 10$$-$$5
B
1.2 $$\times$$ 10$$-$$3
C
1.8 $$\times$$ 10$$-$$3
D
2.4 $$\times$$ 10$$-$$5
3
JEE Main 2022 (Online) 27th June Morning Shift
+4
-1 The susceptibility of a paramagnetic material is 99. The permeability of the material in Wb/A-m, is :

[Permeability of free space $$\mu$$0 = 4$$\pi$$ $$\times$$ 10$$-$$7 Wb/A-m]

A
4$$\pi$$ $$\times$$ 10$$-$$7
B
4$$\pi$$ $$\times$$ 10$$-$$4
C
4$$\pi$$ $$\times$$ 10$$-$$5
D
4$$\pi$$ $$\times$$ 10$$-$$6
4
JEE Main 2022 (Online) 26th June Evening Shift
+4
-1 A bar magnet having a magnetic moment of 2.0 $$\times$$ 105 JT$$-$$1, is placed along the direction of uniform magnetic field of magnitude B = 14 $$\times$$ 10$$-$$5 T. The work done in rotating the magnet slowly through 60$$^\circ$$ from the direction of field is :

A
14 J
B
8.4 J
C
4 J
D
1.4 J
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