Costas's biggest grievance over fake Twitter account. Geographical meridian : A vertical plane passing through a place and geographic north and south axis is called geographic meridian. The time period of vibration is found to be 2 sec. The same needle is then allowed to vibrate in the horizontal plane, and the time period is again found to be 2 seconds. A great circle, which passes through true north and true south is known as meridian. This is known as Magnetic Meridian. The same needle is then allowed to vibrate in the horizontal plane and the time period is again found to be 2 sec. Thus the coil remains in the magnetic meridian. The magnetic meridian at any point, is the direction indicated by a freely suspended (A) Magnetic needle (B) And properly balanced magnetic needle (C) Properly balanced and uninfluenced by local attractive force (D) Magnetic needle over an iron pivot Answer: Option C Question No. The plane of a dip circle is set in the geographic meridian and the apparent dip is δ1. 2.8k SHARES. Magnetic Declination is defined as the angle made by the Magnetic meridian with the geographic meridian. When a magnetic needle is suspended freely in the air, it always points in the north-south direction free form all other attracting forces. 1 answer. The direction of the true meridian … A dip needle vibrates in the vertical plane perpendicular to the magnetic meridian. Performance & security by Cloudflare, Please complete the security check to access. Magnetic meridian is the plane . The magnetic pole is not fixed in position but rather changes its position continually. 4.2 DEFINITIONS. Here geographic meridian is defined as the plane … • A vertical plane at a place passing through magnetic north and south poles of the earth is called the magnetic meridian at that place. The same needle is then allowed to vibrate in the horizontal plane and the time period is again found to be 2 seconds. Find the dip of the place 300+ LIKES. Magnetic meridian is the plane passing through the magnetic axis of Earth. A magnetic needle free to rotate in a vertical plane parallel to the magnetic meridian has its north tip pointing down at 22 o with the horizontal. The angle between the geographic and the magnetic meridian planes is called the magnetic declination. Ask for details ; Follow Report by Sarodekhushabu 18.01.2020 Log in to add a comment Magnetic meridian is (A) a point (B) a line along north-south (C) a horizontal plane (D) a vertical plane. It is a line on the earth’s surface approximating a great circle passing through the north and south magnetic poles. Q: A dip needle vibrates in the vertical plane perpendicular to the magnetic meridian. The vertical plane that passes through the point at which the observer (instrument) is situated and that contains the vector of the geomagnetic field intensity at this point is called the plane of the magnetic meridian. All the magnetic meridians are complicated curves that converge at the north and south magnetic poles of the earth. (iii) It is a vertical plane at any place which contains all the magnetic field lines of earth of that place. Cloudflare Ray ID: 6086b22779f3dfe7 The angle of dip if dip needleoscillating in vertical plane makes 40 oscillations per min in a magnetic meridian and 30 oscillations per minute in vertical plane at right angle to the magnetic meridian is The angle that magnetic meridian makes with the horizontal is … Geometric meridian is the plane( i.e. Another way to prevent getting this page in the future is to use Privacy Pass. Working: When the current is not passed through the coil the magnetic needle is acted upon by only a horizontal component of the earth and thus the magnetic needle remains in the north-south direction. A meridian is any direction such as true meridian, magnetic meridian and arbitrary meridian. The time period of vibration is found to be 2 seconds. The angle of Dip or Magnetic Inclination; Magnetic Declination. The angle between the plane of the magnetic meridian (the needle of a magnetic compass will lie in this plane) and the plane of the geographical meridian at this point of the earth’s surface is called … The magnetometer box is rotated so that the pointer reads 0° – 0°. Meridians passing through the magnetic axis of earth angles to the central meridian a! Declination is defined by freely suspended magnet is called magnetic equator: imaginary. Line, right bisecting the effective length of a compass held at the observer ’ s position by the meridian! 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