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89.The period times of oscillations of a magnetic needle in two mutually perpendicular vertical plane at a place T1 and T2 respectively. If the period time of the same needle in the magnetic meridian is T then ,(true dip angle at the place is delta ) what will be the T

Answer» 89.The period times of oscillations of a magnetic needle in two mutually perpendicular vertical plane at a place T1 and T2 respectively. If the period time of the same needle in the magnetic meridian is T then ,(true dip angle at the place is delta ) what will be the T


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