Consider the plane S formed by the dipole axis and the axis of earth. Let P be point on the magnetic equator and in S. Let Q be the point of intersection of the geographical and magnetic equators Obtain the declination and dip angles at P and Q.

Options

A. `0^(@),11.3^(@)`
B. `11.3^(@),0^(@)`
C. `11.3^(@),11.3^(@)`
D. `0^(@),0^(@)`

Explanation

To solve the problem, we need to analyze the magnetic and geographical equators and their intersection points. Here’s a step-by-step solution:

### Step 1: Understand the Definitions
- **Dip Angle (Inclination)**: The angle made by the magnetic field with the horizontal plane. At the magnetic equator, this angle is 0 degrees.
- **Declination**: The angle between the magnetic north and the geographical north. This angle varies depending on the location on Earth.

### Step 2: Identify Points P and Q
- **Point P**: Located on the magnetic equator, which is the intersection of the magnetic equator and the geographical equator.
- **Point Q**: The point of intersection of the geographical equator and the magnetic axis.

### Step 3: Analyze Point P
- At Point P (magnetic equator):
- The dip angle is **0 degrees** because the magnetic field is horizontal.
- The declination is the angle between the magnetic north and the geographical north. For this problem, it is given as **11.3 degrees**.

### Step 4: Analyze Point Q
- At Point Q (intersection of geographical and magnetic equators):
- The dip angle is also **0 degrees** because it is still on the equatorial plane where the magnetic field is horizontal.
- The declination at this point is the same as at Point P, which is **11.3 degrees**.

### Final Answers
- **At Point P**:
- Dip Angle = 0 degrees
- Declination = 11.3 degrees
- **At Point Q**:
- Dip Angle = 0 degrees
- Declination = 11.3 degrees

### Summary
- For both points P and Q:
- Dip Angle = 0 degrees
- Declination = 11.3 degrees