NEET 2023 Manipur | Magnetism and Matter Question 10 | Physics

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

0.25 A

1.5 A

1 A

2 A

NEET 2021

MCQ (Single Correct Answer)

-1

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 $$\overrightarrow B $$ ?

$$6\widehat i + 6\widehat j - 8\widehat k$$

$$ - 8\widehat i - 8\widehat j - 6\widehat k$$

$$ - 6\widehat i - 6\widehat j - 8\widehat k$$

$$8\widehat i + 8\widehat j - 6\widehat k$$

NEET 2021

MCQ (Single Correct Answer)

-1

A uniform conducting wire of length 12a and resistance 'R' is wound up as a current carrying coil in the shape of ,

(i) an equilateral tringle of side 'a'

(ii) A square of side 'a'

The magnetic dipole moments of the coil in each case respectively are :

4Ia² and 3Ia²

$$\sqrt 3 $$ Ia² and 3I a²

3Ia² and Ia²

3Ia² and 4Ia²

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