If the current in a wire is flowing in the vertically downward direction and a magnetic field is applied from west to east, what is the direction of force on the wire ?

Explanation

To determine the direction of the force on a wire carrying a current in a magnetic field, we can use the right-hand rule (also known as the palm rule). Here’s a step-by-step solution to the problem:

### Step-by-Step Solution:

1. **Identify the Direction of Current**:
The current in the wire is flowing vertically downward.

2. **Identify the Direction of Magnetic Field**:
The magnetic field is applied from west to east.

3. **Apply the Right-Hand Rule**:
- Extend your right hand.
- Point your thumb in the direction of the current (downward).
- Point your fingers in the direction of the magnetic field (from west to east).

4. **Determine the Direction of Force**:
The direction in which your palm pushes outwards represents the direction of the force on the wire. In this case, if your thumb is pointing down (current) and your fingers are pointing from west to east (magnetic field), your palm will face towards the south.

5. **Conclusion**:
Therefore, the direction of the force on the wire is towards the south.

### Final Answer:
The direction of the force on the wire is towards the south.