Recommended MCQs - (NEW NCERT PATTERN) Magnetism and Matter Physics NEET Practice Questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, and PDF solved with answers

The correct direction of the magnetic field in the given figures is shown by:

1.		2.
3.		4.

Subtopic: Magnetic Field & Field Lines |

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Q2:

A magnet of magnetic dipole moment

10 \hat{i} {A-m}^{2}

$10\hat{i}~\text{A-m}^2$ is placed along the x-axis in a magnetic field

\vec{B} = (\hat{i} + 2 \hat{j}) T .

$\vec B=(\hat i+2\hat j)~\text{T}.$ The torque acting on the magnet is:

1.	$(30\widehat k)~\text{N-m}$	2.	$(10\widehat i+20\widehat j)~\text{N-m}$
3.	$(20\widehat k)~\text{N-m}$	4.	$(-30\widehat k)~\text{N-m}$

Subtopic: Magnetic Moment |

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Q3:

Which of the following is the correct representation of magnetic field lines?

1.	(g), (c)	2.	(d), (f)
3.	(a), (b)	4.	(c), (e)

Subtopic: Magnetic Field & Field Lines |

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Q4:

The magnetic lines of force inside a bar magnet are:

1.	from the south to the north pole.
2.	from the north to the south pole.
3.	not present.
4.	intersecting each other.

Subtopic: Magnetic Field & Field Lines |

86%

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Q5:

Two identical bar magnets are kept as shown in the figure. The direction of the resultant magnetic field, indicated by the arrowhead at the point

P

$P$ is:

1.		2.
3.		4.

Subtopic: Magnetic Field & Field Lines |

55%

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Q6:

Which one of the following is correct?

1.	The magnetic field lines also represent the lines of force on a moving charged particle at every point.
2.	The magnetic field lines can be entirely confined within the core of a toroid, but not within a straight solenoid.
3.	A bar magnet exerts a torque on itself due to its own field.
4.	The magnetic field arises due to stationary charges.

Subtopic: Magnetic Field & Field Lines |

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Q7:

The unit of magnetic flux is:
1. Oersted
2. Gauss
3. Tesla
4. Maxwell

Subtopic: Magnetic Field & Field Lines |

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Q8:

A bar magnet having a magnetic moment of

2.0 \times 10^{5} {JT}^{- 1}

$2.0\times10^{5}~\text{JT}^{-1}$ is placed along the direction of the uniform magnetic field of magnitude,

B = 14 \times 10^{- 5} T

$B=14\times10^{-5}~\text{T}$ . The work done in rotating the magnet slowly through

60^{\circ}

$60^\circ$ from the direction of the field is:
1.

14 J

$14~\text{J}$
2.

8.4 J

$8.4~\text{J}$
3.

4 J

$4~\text{J}$
4.

1.4 J

$1.4~\text{J}$

Subtopic: Bar Magnet |

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Q9:

If a magnetic needle is made to vibrate in uniform field $H$ , then its time period is $T$ . If it vibrates in the field of intensity $4H$ , its time period will be:

1.	$2T$	2.	$\dfrac{T}{2}$
3.	$\dfrac{2}{T}$	4.	$T$

Subtopic: Bar Magnet |

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Q10:

A

100

$100$ -turn coil of wire of size

2 cm \times 1.5 cm

$2~\text{cm}\times 1.5~\text{cm}$ is suspended between the poles of a magnet producing a field of

1 T,

$1~\text T,$ inside a galvanometer. Calculate the torque on the coil due to a current of

0.1 A

$0.1~\text{A}$ passing through the coil.
1.

3 \times 10^{- 5}

$3 \times 10^{-5}$ N-m
2.

30

$30$ N-m
3.

3 \times 10^{- 3}

$3 \times 10^{-3}$ N-m
4.

3 \times 10^{- 2}

$3 \times 10^{-2}$ N-m

Subtopic: Bar Magnet |

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