How are field lines in a uniform magnetic field?

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Curved

Parallel equidistant straight lines

Parallel but non-equidistant straight lines

answer is B.

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Detailed Solution

Concept: With a single permanent magnet, magnetic fields are inconceivable to achieve. First and foremost, you need understand what an attractive transition is. M-Flux is the number of magnetic field lines that emerge from a magnet for each unit territory. If the number is high, it means the magnetic field is strong. The magnetic field is fragile if the number is less than one.
The magnetic field's qualities are as follows:
i. Magnetic field lines do not cross each other.
ii. The magnetic field lines are always in a closed circle as they move from the north pole to the south pole.
iii. The magnetic field's path is perpendicular to the field line.
iv. The strength of the field is always proportional to the density of the lines.
Hence, option 2 is correct.

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