MCQ
At two places $A$ and $B$ using vibration magnetometer, a magnet vibrates in a horizontal plane and its respective periodic time are $2 \sec$ and $3 \sec$ and at these places the earth's horizontal components are $H_A$ and $H_B$ respectively. Then the ratio between $H_A$ and $H_B$ will be
  • A
    $9 : 4$
  • B
    $ 3 : 2$
  • $4 : 9$ 
  • D
    $2 : 3$

Answer

Correct option: C.
$4 : 9$ 
$9 : 4$

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