CUET · PHYSICS · PYQ PAPER 2025
A bar magnet with pole strength m and magnetic dipole moment p is cut into two identical pieces along its length.
Then for each of the two pieces
- A pole strength and dipole moment are m and p, respectively
- B pole strength and dipole moment are m/2 and p/2, respectively
- C pole strength is m/2 and dipole moment is p
- D pole strength is m and dipole moment is p/2
Answer & Solution
Correct Answer
(B) pole strength and dipole moment are m/2 and p/2, respectively
Step-by-step Solution
Detailed explanation
Pole strength \(m' = m/2\). Magnetic length \(L' = L\). Magnetic dipole moment \(p' = m'L' = (m/2)L = p/2\).
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