1
AP EAPCET 2024 - 21th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
If the vertical component of the earth's magnetic field is 0.45 G at a location and angle of dip is $60^{\circ}$, then magnetic field of earth in that location is
A
0.26 G
B
0.52 G
C
0.3 G
D
0.7 G
2
AP EAPCET 2024 - 20th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
At a place where the magnitude of the earth's magnetic field is $4 \times 10^{-5} \mathrm{~T}$, a short bar magnet is placed with its axis perpendicular to the earth's magnetic field direction. If the resultant magnetic field at a point at a distance of 40 cm from the centre of the magnet on the normal bisector of the magnet is inclined at $45^{\circ}$ with the earth's field, then the magnele moment of the magnet is
A
$38.4 \mathrm{Am}^2$
B
$51.2 \mathrm{Am}^2$
C
$12.8 \mathrm{Am}^2$
D
$25.6 \mathrm{Am}^3$
3
AP EAPCET 2024 - 20th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
Any magnetic material loses its magnetic property when it is
A
dipped in water
B
dipped in sand
C
attached to an iron piece
D
heated to high temperature
4
AP EAPCET 2024 - 19th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
The domain in ferromagnetic material is in the form of a cube of side $2 \mu \mathrm{~m}$. Number of atoms in that domain is $9 \times 10^{10}$ and each atom has a dipole movement of $9 \times 10^{-24} \mathrm{Am}^2$. The magnetisation of the domain is (approximately).
A
$10 \times 10^4 \mathrm{Am}^{-1}$
B
$8 \times 10^4 \mathrm{Am}^{-1}$
C
$12 \times 10^4 \mathrm{Am}^{-1}$
D
$9 \times 10^4 \mathrm{Am}^{-1}$
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