Angle of dip is zero at...

Angle of dip is zero at

Poles

equator

between poles of equator

none of these

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A long straight horizontal cable carries a current of 3*3A in the direction 10^@ south of west to 10^@ north of east. The magnetic meridian of the plane happens to be 10^@ west of the geographic meridian. The earth's magnetic field at the location is 0*33G and the angle of dip is zero degree. Locate the positions of neutral points?

A long straight horizontal cable carries a current of 2.5amp . In the direction 10^@ south of west to 10^@ north of east, figure. The magnetic meridian of the place happens to be 10^@ west of the geographic meridian. The earth's magnetic field at the location is 0.33G and the angle of dip is zero. Locate the line of neutral points (Ignore the thickness of the cable). [At neutral points, magnetic fied due to a current cable is equal and opposite to the horizontal component of earth's magnetic field.]

We can define two planes for a particular location on the surface of earth. One is called magnetic meridian and the other is called geographic meridian. Magnetic meridian for a point on the surface of earth is defined as a plane passing through this point and containing magnetic axis of earth. Similarly geographic meridian for a point on the surface of earth is defined as plane passing through this point and containing geographic axis of rotation. If we draw these two planes for a point on the surface of earth then in general these are found at some angle. Angle between these two planes is called declination for that place. Importance of magnetic meridian at a point is that net magnetic field vector of earth for that point lies on this plane. Usually net magnetic field of earth is inclined at some angle with the horizontal and this angle is called angle of dip for that place. How many points are there on surface of earth where angle of dip is zero ?

Angle of dip is 90^@ at:

The angle of dip is the angle

At a place of latitude 5^@ , angle of dip is nearly

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