The ratio of magnetic moments of two bar magnets is $$13$$ : $$5$$.These magnets held together in a vibration magnetometer, are allowed to oscillate in earth's magnetic field with like poles together such that $$15$$ oscillations per minute are made. What will be the frequency of oscillation of system if unlike poles are together?

Question

Infinity Learn · Accepted Answer

ϑ$$s=12$$π$$(M1+M2)BHI$$ϑ$$d=12$$π$$(M1-M2)BHI$$  $$M1M2=$$ϑ$$s2+$$ϑ$$d2$$ϑ$$s2-$$ϑ$$d2$$⇒$$135=152+$$ϑ$$d2152-$$ϑ$$d2$$⇒ϑd $$=$$ $$10$$ $$oscillations/min$$

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