The dip angle at a location in southern India is about `18^(@)`. Then the dip angle in Britain will be

Options

A. greater than `18^(@)`
B. lesser than `18^(@)`
C. equal to `18^(@)`
D. zero

Explanation

To determine the dip angle in Britain based on the dip angle in southern India, we can use the concept of magnetic inclination, which varies with geographical location due to the Earth's magnetic field. The dip angle, or magnetic inclination, is the angle made with the horizontal by the Earth's magnetic field lines.

### Step-by-Step Solution:

1. **Understanding Dip Angle**: The dip angle (also known as magnetic inclination) is the angle at which the Earth's magnetic field lines enter the Earth. It varies from location to location.

2. **Given Information**: We know that the dip angle in southern India is approximately `18°`.

3. **Geographical Variation**: The dip angle changes with latitude. In general, the dip angle increases as one moves towards the poles and decreases towards the equator.

4. **Estimating Dip Angle in Britain**: Britain is located at a higher latitude compared to southern India. Therefore, we can expect the dip angle in Britain to be greater than `18°`.

5. **Researching Typical Values**: Based on standard geomagnetic data, the dip angle in Britain is typically around `60°` to `70°`, depending on the specific location within Britain.

6. **Conclusion**: Since the dip angle in southern India is `18°`, we can conclude that the dip angle in Britain will be significantly higher, likely around `60°` to `70°`.

### Final Answer:
The dip angle in Britain will be approximately `60°` to `70°`.

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