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1
JEE Main 2021 (Online) 20th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
At an angle of 30$$^\circ$$ to the magnetic meridian, the apparent dip is 45$$^\circ$$. Find the true dip :
A
$${\tan ^{ - 1}}\sqrt 3 $$
B
$${\tan ^{ - 1}}{1 \over {\sqrt 3 }}$$
C
$${\tan ^{ - 1}}{2 \over {\sqrt 3 }}$$
D
$${\tan ^{ - 1}}{{\sqrt 3 } \over 2}$$
2
JEE Main 2021 (Online) 20th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
The magnetic susceptibility of a material of a rod is 499. Permeability in vacuum is 4$$\pi$$ $$\times$$ 10$$-$$7 H/m. Absolute permeability of the material of the rod is :
A
4$$\pi$$ $$\times$$ 10$$-$$4 H/m
B
2$$\pi$$ $$\times$$ 10$$-$$4 H/m
C
3$$\pi$$ $$\times$$ 10$$-$$4 H/m
D
$$\pi$$ $$\times$$ 10$$-$$4 H/m
3
JEE Main 2021 (Online) 20th July Morning Shift
MCQ (Single Correct Answer)
+4
-1
A deuteron and an alpha particle having equal kinetic energy enter perpendicularly into a magnetic field. Let rd and r$$\alpha$$ be their respective radii of circular path. The value of $${{{r_d}} \over {{r_\alpha }}}$$ is equal to :
A
1
B
2
C
$$\sqrt 2 $$
D
$${1 \over {\sqrt 2 }}$$
4
JEE Main 2021 (Online) 20th July Morning Shift
MCQ (Single Correct Answer)
+4
-1
The arm PQ of a rectangular conductor is moving from x = 0 to x = 2b outwards and then inwards from x = 2b to x = 0 as shown in the figure. A uniform magnetic field perpendicular to the plane is acting from x = 0 to x = b. Identify the graph showing the variation of different quantities with distance.

JEE Main 2021 (Online) 20th July Morning Shift Physics - Magnetics Question 82 English
A
A-Flux, B-Power dissipated, C-EMF
B
A-Flux, B-EMF, C-Power dissipated
C
A-Power dissipated, B-Flux, C-EMF
D
A-EMF, B-Power dissipated, C-Flux
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