AP EAMCET · PHYSICS · Magnetic Properties of Matter
If a bar magnet of pole strength \(m\) and magnetic moment \(M\) is cut equally 5 times parallel to its axis and again 3 times perpendicular to its axis, then the pole strength and magnetic moment of each piece are respectively
- A \(\frac{m}{20}, \frac{M}{4}\)
- B \(\frac{m}{5}, \frac{M}{20}\)
- C \(\frac{m}{6}, \frac{M}{24}\)
- D \(\frac{m}{5}, \frac{M}{24}\)
Answer & Solution
Correct Answer
(C) \(\frac{m}{6}, \frac{M}{24}\)
Step-by-step Solution
Detailed explanation
Given, pole strength \(=m\) and magnetic moment \(=M\) When it is cut 5 times parallel to its axis, pole strength, \(m^{\prime}=\frac{m}{6}\) When it is cut 3 times perpendicular to its axis, then length \(2 l^{\prime}=\frac{2 l}{4}\) \(\therefore\) pole strength,…
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