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Q.

A bar magnet of pole strength ‘m’ and magnetic moment ‘M’ is cut equally 5 parts parallel to its axis and 4 parts perpendicular to its axis then the pole strength and magnetic moment of each piece are respectively

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a

$\frac{m}{2}, \frac{M}{20}$

b

$\frac{m}{4}, \frac{M}{20}$

c

$\frac{m}{5}, \frac{M}{20}$

d

$\frac{m}{5}, \frac{M}{4}$

answer is C.

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