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

 1 2 3 4
Subtopic:  Magnetic Field & Field Lines |
91%
From NCERT
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A magnet of magnetic dipole moment $$10\hat{i}$$ A-m2 is placed along the x-axis in a magnetic field $$\vec B=(\widehat i+2\widehat j)$$ T. The torque acting on the magnet is:
1. $$(30\widehat k)$$ N-m
2. $$(10\widehat i+20\widehat j)$$ N-m
3. $$(20\widehat k)$$ N-m
4. $$(-30\widehat k)$$ N-m
Subtopic:  Magnetic Field & Field Lines |
86%
From NCERT
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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 |
85%
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The magnetic lines of force inside a bar magnet are:

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

Subtopic:  Magnetic Field & Field Lines |
84%
From NCERT
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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 $$\text{P}$$ is:

 1 2 3 4
Subtopic:  Magnetic Field & Field Lines |
57%
From NCERT
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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 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 Magnetic field arises due to stationary charges.

Subtopic:  Magnetic Field & Field Lines |
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The unit of magnetic flux is:
1. Oersted
2. Gauss
3. Tesla
4. Maxwell
Subtopic:  Magnetic Field & Field Lines |
From NCERT
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A bar magnet having a magnetic moment of $$2.0\times10^{5}$$ JT–1 is placed along the direction of the uniform magnetic field of magnitude, $$B=14\times10^{-5}$$ T. The work done in rotating the magnet slowly through $$60^\circ$$ from the direction of the field is:
1. $$14$$ J
2. $$8.4$$ J
3. $$4$$ J
4. $$1.4$$ J
Subtopic:  Bar Magnet |
91%
From NCERT
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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. T/2

3. 2/T

4. T

Subtopic:  Bar Magnet |
80%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh

A $$100$$-turn coil of wire of size $$2~\mathrm{cm}\times 1.5~\mathrm{cm}$$ is suspended between the poles of a magnet producing a field of $$1$$ T, inside a galvanometer. Calculate the torque on the coil due to a current of $$0.1~\mathrm{A}$$ passing through the coil.
1. $$3 \times 10^{-5}$$ N-m
2. $$30$$ N-m
3. $$3 \times 10^{-3}$$ N-m
4. $$3 \times 10^{-2}$$ N-m
Subtopic:  Bar Magnet |
79%
From NCERT