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

An iron bar of length $$L$$ has magnetic moment $$M$$. It is bent at the middle of its length such that the two arms make an angle $$60^{\circ}$$ with each other. The magnetic moment of this new magnet is :

A
$$M$$
B
$$\frac{M}{2}$$
C
$$2 M$$
D
$$\frac{M}{\sqrt{3}}$$
2
NEET 2023 Manipur
MCQ (Single Correct Answer)
+4
-1
Change Language

The variation of susceptibility $$(\chi)$$ with absolute temperature ( $$\mathrm{T}$$ ) for a paramagnetic material is represented as :

A
NEET 2023 Manipur Physics - Magnetism and Matter Question 10 English Option 1
B
NEET 2023 Manipur Physics - Magnetism and Matter Question 10 English Option 2
C
NEET 2023 Manipur Physics - Magnetism and Matter Question 10 English Option 3
D
NEET 2023 Manipur Physics - Magnetism and Matter Question 10 English Option 4
3
NEET 2022 Phase 1
MCQ (Single Correct Answer)
+4
-1
Change Language

A big circular coil of 1000 turns and average radius 10 m is rotating about its horizontal diameter at 2 rad s$$-$$1. If the vertical component of earth's magnetic field at that place is 2 $$\times$$ 10$$-$$5 T and electrical resistance of the coil is 12.56 $$\Omega$$, then the maximum induced current in the coil will be

A
0.25 A
B
1.5 A
C
1 A
D
2 A
4
NEET 2021
MCQ (Single Correct Answer)
+4
-1
Change Language
In the product

$$\overrightarrow F = q\left( {\overrightarrow v \times \overrightarrow B } \right)$$

$$ = q\overrightarrow v \times \left( {B\widehat i + B\widehat j + {B_0}\widehat k} \right)$$

For q = 1 and $$\overrightarrow v = 2\widehat i + 4\widehat j + 6\widehat k$$ and $$\overrightarrow F = 4\widehat i - 20\widehat j + 12\widehat k$$

What will be the complete expression for $$\overrightarrow B $$ ?
A
$$6\widehat i + 6\widehat j - 8\widehat k$$
B
$$ - 8\widehat i - 8\widehat j - 6\widehat k$$
C
$$ - 6\widehat i - 6\widehat j - 8\widehat k$$
D
$$8\widehat i + 8\widehat j - 6\widehat k$$
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