**Direction of Magnetic Field Below the Power Line:**

When a current flows through a horizontal power line in the East to West direction, the magnetic field around the power line can be determined using the right-hand rule.

1. **Right-Hand Rule:**
- The right-hand rule states that if you point your right thumb in the direction of the current flow, your curled fingers will show the direction of the magnetic field around the wire.

2. **Direction of Magnetic Field Below the Power Line:**
- According to the right-hand rule, if you place your right thumb pointing towards the East (the direction of the current flow), your curled fingers will point downwards.
- This means that the magnetic field below the power line is directed towards the ground, perpendicular to the horizontal power line.

3. **Explanation:**
- The direction of the magnetic field below the power line is determined by the interaction between the current-carrying wire and the Earth's magnetic field.
- The Earth's magnetic field lines run from the geographic north pole to the geographic south pole.
- When the current flows through the power line in the East to West direction, it creates a magnetic field around the wire.
- The interaction between the current's magnetic field and the Earth's magnetic field results in the magnetic field below the power line being directed towards the ground.

**Direction of Magnetic Field Above the Power Line:**

1. **Right-Hand Rule:**
- As mentioned earlier, the right-hand rule can be used to determine the direction of the magnetic field around a current-carrying wire.

2. **Direction of Magnetic Field Above the Power Line:**
- According to the right-hand rule, if you place your right thumb pointing towards the West (opposite to the direction of the current flow), your curled fingers will point upwards.
- This means that the magnetic field above the power line is directed away from the ground, perpendicular to the horizontal power line.

3. **Explanation:**
- Similar to the explanation for the magnetic field below the power line, the magnetic field above the power line is also influenced by the Earth's magnetic field.
- The interaction between the current's magnetic field and the Earth's magnetic field results in the magnetic field above the power line being directed away from the ground.

In summary, the magnetic field below a horizontal power line carrying a current in the East to West direction is directed towards the ground, while the magnetic field above the power line is directed away from the ground. These directions can be determined using the right-hand rule and are a result of the interaction between the current's magnetic field and the Earth's magnetic field.

The current is in the east-west direction. Applying the right-hand thumb rule, we get that the direction of magnetic field at a point below the wire is from north to south. The direction of magnetic field at a point directly above the wire is from south to north.
If more simplified,The direction of magnetic field around a current carrying conduction is determined by using Ampere’s Thumb rule. If you are facing towards current flowing direction ,the direction of magnetic field is in clockwise direction. Now in the question current flowing from west to east , so if you stand facing east direction ,at point below the conductor the magnetic field is towards north direction (clockwise).