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81.A dip needle initially lies in magnetic meridian when it shows angle of dip theta there .The dip circle is rotated through an angle x in the horizontal plane , and dip angle in that plane is theta'. |
| Answer» 81.A dip needle initially lies in magnetic meridian when it shows angle of dip theta there .The dip circle is rotated through an angle x in the horizontal plane , and dip angle in that plane is theta'. | |