A vertical wire carrying a current in the upward direction is placed in horizontal magnetic field directed towards north. The wire will experience a force directed towards

Options

A. North
B. South
C. East
D. West

Answer

To determine the direction of the force experienced by a vertical wire carrying a current in an upward direction placed in a horizontal magnetic field directed towards the north, we can use Fleming's Left Hand Rule. Here’s a step-by-step solution:

### Step 1: Identify the Directions
- **Current Direction (I)**: The current is flowing upwards (vertically).
- **Magnetic Field Direction (B)**: The magnetic field is directed towards the north (horizontally).

### Step 2: Apply Fleming's Left Hand Rule
Fleming's Left Hand Rule states that if you align your thumb, forefinger, and middle finger of your left hand perpendicular to each other:
- **Thumb**: Represents the direction of the Force (F) experienced by the conductor.
- **Forefinger**: Represents the direction of the Magnetic Field (B).
- **Middle Finger**: Represents the direction of the Current (I).

### Step 3: Position Your Fingers
1. Point your **forefinger** in the direction of the magnetic field (towards the north).
2. Point your **middle finger** in the direction of the current (upwards).

### Step 4: Determine the Direction of the Force
- Your **thumb** will now point in the direction of the force experienced by the wire.

### Conclusion
According to Fleming's Left Hand Rule, when the forefinger points north and the middle finger points up, the thumb will point towards the west. Therefore, the wire will experience a force directed towards the **west**.