1
AP EAPCET 2024 - 20th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
Two long straight parallel conductors $A$ and $B$ carrying currents 4.5 A and 8 A respectively, are separated by 25 cm in air. The resultant magnetic field at a point which is at a distance of 15 cm from conductor $A$ and 20 cm from conductor $B$ is
A
$2 \times 10^{-5} \mathrm{~N}$
B
$2 \times 10^{-4} \mathrm{~N}$
C
$10^{-5} \mathrm{~N}$
D
$10^{-4} \mathrm{~N}$
2
AP EAPCET 2024 - 20th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
Two concentric thin circular rings of radii 50 cm and 40 cm , each carry a current of 3.5 A in opposite directions. If the two rings are coplanar, the net magnetic field due to the rings at their centre is
A
$11 \times 10^{-7} \mathrm{~T}$
B
$17 \times 10^{-7} \mathrm{~T}$
C
$22 \times 10^{-7} \mathrm{~T}$
D
#VALUE!
3
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
$25.6 \mathrm{Am}^3$
4
AP EAPCET 2024 - 20th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
The ratio of the number of turns per unit length of two solenoids $A$ and $B$ are 1:3 and the lengths of $A$ and $B$ are in the ratio $1: 2$. If the two solenoids have same cross-sectional area, the ratio of the self-inductances of the solenoids $A$ and $B$ is
A
$1: 12$
B
$1: 6$
C
$1: 18$
D
$1: 9$
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