A straight wire carrying current is parallel to the y-axis as shown in Fig. The

A. magnetic field at the point P parallel to the x axis
B. magnetic field at P along z axis
C. magnetic field are concentric circle with wire passing through thier common center
D. magnetic field to the left and right of the wire and oppositely directed

Options

A. magnetic field at the point P parallel to the x axis
B. magnetic field at P along z axis
C. magnetic field are concentric circle with wire passing through thier common center
D. magnetic field to the left and right of the wire and oppositely directed

Answer

To solve the question regarding the magnetic field produced by a straight wire carrying current parallel to the y-axis, we can analyze the situation step by step.

### Step-by-Step Solution:

1. **Understanding the Setup**:
- We have a straight wire carrying current, oriented along the y-axis. We need to determine the direction and nature of the magnetic field at a point P in relation to this wire.

2. **Using the Right-Hand Rule**:
- To find the direction of the magnetic field around a current-carrying wire, we can use the right-hand rule. If you point your thumb in the direction of the current (along the y-axis), your fingers will curl around the wire in the direction of the magnetic field lines.

3. **Determining the Direction of the Magnetic Field**:
- At point P, which is located in the x-z plane, the magnetic field will be directed perpendicularly to both the current and the line connecting the wire to point P. Depending on the position of point P (whether it is above or below the wire), the magnetic field will either point in the positive or negative x-direction.

4. **Analyzing the Options**:
- **Option A**: Magnetic field at point P parallel to the x-axis. This is true if point P is located at a position where the magnetic field is directed along the x-axis.
- **Option B**: Magnetic field at P along the z-axis. This is false; the magnetic field does not point along the z-axis.
- **Option C**: Magnetic field lines are concentric circles with the wire passing through their common center. This is true; the magnetic field forms concentric circles around the wire.
- **Option D**: Magnetic field to the left and right of the wire and oppositely directed. This is true; on either side of the wire, the magnetic field lines point in opposite directions.

5. **Conclusion**:
- The correct options are A, C, and D. Option B is incorrect.

### Final Answer:
- A. True
- B. False
- C. True
- D. True