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STD 12 - 5. Magnetism and matter — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETSTD 12 - 5. Magnetism and matter4 Marks
MCQ
In sum and difference method in vibration magnetometer, the time period is more if
  • A
    Similar poles of both magnets are on same sides
  • ✓
    Opposite poles of both magnets are on same sides
  • C
    Both magnets are perpendicular to each other
  • D
    Nothing can be said
✓

Answer

Correct option: B.
Opposite poles of both magnets are on same sides
b
(b)In sum position : ${T_S} = 2\pi \sqrt {\frac{{{I_s}}}{{({M_1} + {M_2}){B_H}}}} $
In difference position : ${T_d} = 2\pi \sqrt {\frac{{{I_d}}}{{({M_1} - {M_2}){B_H}}}} $
It is clear that ${T_d} > {T_s}$

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