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NEET 2010 (AIPMT, Mains) · Field of a Magnet & Magnet in a Uniform Field

Field of a Magnet & Magnet in a Uniform Field question from NEET 2010 (AIPMT, Mains)

Q27NEET 2010 · AIPMT · MAINSEasy

Field of a Magnet & Magnet in a Uniform Field

Two identical bar magnets are fixed with their centers at a distance d apart. A stationary charge Q is placed at P in between the gap of the two magnets at a distance D from the centre O as shown in the figure

Figure

The force on the charge Q is

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Answer: (a)

  1. Magnetic force on a charge: F⃗=Q v⃗×B⃗\vec F = Q\,\vec v \times \vec B.
  2. The charge is stationary, v=0v = 0, so F=0F = 0 whatever the field at P.
  3. So the answer is (a) zero.
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