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Grade: 12

                        

Why we have to keep the arms of deflection magnetometer on east west direction in TanA position..?

6 years ago

Answers : (1)

Aarti Gupta
askIITians Faculty
300 Points
							In this position arms of magnetometer are perpendicular to the magnetic
 meridian and deflection magnetometer works on the principle of tangent 
law according to which when two uniform magnetic fields act as right 
angels to each other on a magnetic needle,it comes to rest in the 
direction of resultant field B = BH tan theta where,
B= magnetic induction due to bar magnet
BH = horizontal component of earth's magnetic field
theta = angel through which the needle is deflected
Thanks & Regards
Aarti Gupta
askiitians Faculty
6 years ago
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