1
NEET 2024
MCQ (Single Correct Answer)
+4
-1
Change Language

In a uniform magnetic field of $$0.049 \mathrm{~T}$$, a magnetic needle performs 20 complete oscillations in 5 seconds as shown. The moment of inertia of the needle is $$9.8 \times 10^{-6} \mathrm{~kg} \mathrm{~m}^2$$. If the magnitude of magnetic moment of the needle is $$x \times 10^{-5} \mathrm{~Am}^2$$, then the value of '$$x$$' is :

NEET 2024 Physics - Magnetism and Matter Question 7 English

A
5$$\pi^2$$
B
128$$\pi^2$$
C
50$$\pi^2$$
D
1280$$\pi^2$$
2
NEET 2024
MCQ (Single Correct Answer)
+4
-1
Change Language

A wire of length '$$l$$' and resistance $$100 \Omega$$ is divided into 10 equal parts. The first 5 parts are connected in series while the next 5 parts are connected in parallel. The two combinations are again connected in series. The resistance of this final combination is:

A
$$26 \Omega$$
B
$$52 \Omega$$
C
$$55 \Omega$$
D
$$60 \Omega$$
3
NEET 2024
MCQ (Single Correct Answer)
+4
-1
Change Language

A horizontal force $$10 \mathrm{~N}$$ is applied to a block $$A$$ as shown in figure. The mass of blocks $$A$$ and $$B$$ are $$2 \mathrm{~kg}$$ and 3 $$\mathrm{kg}$$ respectively. The blocks slide over a frictionless surface. The force exerted by block $$A$$ on block $$B$$ is :

NEET 2024 Physics - Laws of Motion Question 2 English

A
Zero
B
4 N
C
6 N
D
10 N
4
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
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