Select the correct statement :(Only force on a particle is due to electric field)

Options

A. A charged particle always moves along the electric line of force
B. A charged particle may move along the line of force
C. A charge particle never moves along the line of force
D. A charged particle moves along the line of force only if released from rest

Explanation

To solve the question, we need to analyze the statements regarding the motion of a charged particle in an electric field. Let's break down the options step by step.

### Step 1: Understanding Electric Field Lines
Electric field lines represent the direction of the electric field at various points in space. A charged particle placed in an electric field experiences a force that causes it to move.

### Step 2: Analyzing Each Option
- **Option A**: "A charged particle always moves along the electric line of force."
- This statement is misleading. A charged particle will move along the line of force only if the electric field is uniform (straight lines). In a non-uniform field (curved lines), the path may not align with the electric field lines. Therefore, this option is incorrect.

- **Option B**: "A charged particle may move along the line of force."
- This statement is more accurate. A charged particle can move along the line of force, especially if it is released from rest at a point on the line. However, it does not always have to follow the line of force, especially if it has an initial velocity not aligned with the field lines. Thus, this option is correct.

- **Option C**: "A charged particle never moves along the line."
- This statement is incorrect. A charged particle can move along the line of force if it is released from rest or if it has a velocity component along the line of force.

- **Option D**: "If some velocity is given along the line of force, then it definitely moves."
- This statement is also incorrect. While a charged particle may continue to move along the line of force if it has an initial velocity in that direction, it is not guaranteed to do so indefinitely, especially if other forces act on it.

### Conclusion
After analyzing all the options, we find that the correct statement is **Option B**: "A charged particle may move along the line of force."