1
NEET 2025
MCQ (Single Correct Answer)
+4
-1
Change Language

A 2 amp current is flowing through two different small circular copper coils having radii ratio $1: 2$. The ratio of their respective magnetic moments will be

A
$2: 1$
B
$4: 1$
C
$1: 4$
D
$1: 2$
2
NEET 2024
MCQ (Single Correct Answer)
+4
-1
Change Language

A tightly wound 100 turns coil of radius $$10 \mathrm{~cm}$$ carries a current of $$7 \mathrm{~A}$$. The magnitude of the magnetic field at the centre of the coil is (Take permeability of free space as $$4 \pi \times 10^{-7} \mathrm{SI}$$ units):

A
44 mT
B
4.4 T
C
4.4 mT
D
44 T
3
NEET 2024
MCQ (Single Correct Answer)
+4
-1
Change Language

A parallel plate capacitor is charged by connecting it to a battery through a resistor. If $$I$$ is the current in the circuit, then in the gap between the plates:

A
There is no current
B
Displacement current of magnitude equal to $$I$$ flows in the same direction as $$I$$
C
Displacement current of magnitude equal to $$I$$ flows in a direction opposite to that of $$I$$
D
Displacement current of magnitude greater than $$I$$ flows but can be in any direction
4
NEET 2023 Manipur
MCQ (Single Correct Answer)
+4
-1
Change Language

A long straight wire of length $$2 \mathrm{~m}$$ and mass $$250 \mathrm{~g}$$ is suspended horizontally in a uniform horizontal magnetic field of $$0.7 \mathrm{~T}$$. The amount of current flowing through the wire will be $$\left(\mathrm{g}=9.8 \mathrm{~ms}^{-2}\right)$$ :

A
2.45 A
B
2.25 A
C
2.75 A
D
1.75 A
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