At a point A on the earth's surface of angle of dip, `delta=+25^(@)`. At a point B on the earth's surface the angle of dip, `delta=-25^(@)`. We can interpret that.

Options

A. A and B are both located in the southern hemisphere.
B. A and B are both located in the northern hemisphere.
C. A is located in the southern hemisphere and B is located in the northern hemisphere.
D. A is located in the northern hemisphere and B is located in the southern hemisphere.

Explanation

To interpret the given angles of dip at points A and B on the Earth's surface, we can follow these steps:

### Step 1: Understand the Concept of Angle of Dip
The angle of dip (or magnetic dip) is the angle that the Earth's magnetic field makes with the horizontal plane. It is measured from the horizontal down to the magnetic field lines. A positive angle indicates that the magnetic field is dipping into the Earth, while a negative angle indicates that it is rising out of the Earth.

### Step 2: Analyze Point A
At point A, the angle of dip is given as +25 degrees. This means that the magnetic field lines are dipping into the Earth at an angle of 25 degrees from the horizontal. This is typical in regions where the magnetic field is directed downwards.

### Step 3: Analyze Point B
At point B, the angle of dip is given as -25 degrees. This indicates that the magnetic field lines are rising out of the Earth at an angle of 25 degrees from the horizontal. This situation can occur in regions where the magnetic field is directed upwards.

### Step 4: Interpretation of the Difference
The difference in the angles of dip at points A and B suggests that these two points are located in different magnetic environments. Point A, with a positive dip, is likely situated in a region where the magnetic field is stronger and directed downwards, while point B, with a negative dip, may be in a region where the magnetic field is weaker or influenced by other geological factors, causing the field lines to rise.

### Step 5: Conclusion
In summary, the angle of dip at point A (+25 degrees) indicates a downward magnetic field, while the angle of dip at point B (-25 degrees) indicates an upward magnetic field. This difference can be attributed to the varying magnetic properties of the Earth's crust at these two locations.

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