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A bar magnet of the magnetic moment 5 Am2 has poles 20 cm apart. Calculate the pole strength.
  • a)
    250 Am
  • b)
    4 Am
  • c)
    100 Am
  • d)
    25 Am
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
A bar magnet of the magnetic moment 5 Am2 has poles 20 cm apart. Calcu...
Given:
Magnetic moment = 5 Am²
Distance between poles = 20 cm

To find:
Pole strength

Formula:
Magnetic moment (M) = Pole strength (m) x Distance between poles (d)

Calculation:
Substituting the given values in the formula, we get
5 Am² = m x 20 cm

Converting cm to m, we get
5 Am² = m x 0.2 m

Dividing both sides by 0.2 m, we get
Pole strength (m) = 5 Am² / 0.2 m
Pole strength (m) = 25 Am

Therefore, the pole strength of the bar magnet is 25 Am.
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Community Answer
A bar magnet of the magnetic moment 5 Am2 has poles 20 cm apart. Calcu...
Magnetic dipole moment = Pole strength × Magnetic length.
Pole strength = Magnetic dipole moment / Magnetic length
Pole strength = 5 / 0.2
Pole strength = 25 Am.
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A bar magnet of the magnetic moment 5 Am2 has poles 20 cm apart. Calculate the pole strength.a)250 Amb)4 Amc)100 Amd)25 AmCorrect answer is option 'D'. Can you explain this answer?
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