In case of a simple microscope, the object is placed at

Options

A. Focus f of the convex lens
B. A position between f and 2f
C. Beyond 2f
D. Between the lens and f

Answer

To determine where to place the object in a simple microscope (which is a convex lens) to obtain a magnified image, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Simple Microscope**: A simple microscope consists of a convex lens, which is used to magnify small objects.

2. **Identify the Key Points of the Lens**: For a convex lens, we have important points such as the focal point (F) and twice the focal length (2F). The focal length is the distance from the lens to the focal point.

3. **Determine the Position for Magnification**: To achieve a magnified image, the object must be placed between the focal point (F) and the lens (pole). This is the only position where the lens can produce a virtual, upright, and magnified image.

4. **Analyze the Options**:
- **Option 1**: Placing the object at the focus (F) results in an image at infinity, which is not magnified.
- **Option 2**: Placing the object between F and 2F produces a real image, which is not magnified.
- **Option 3**: Placing the object beyond 2F results in a real image that is smaller than the object.
- **Option 4**: Placing the object between the focal point (F) and the lens produces a magnified virtual image.

5. **Conclusion**: The correct placement of the object for a simple microscope to produce a magnified image is between the focal point (F) and the lens (pole).

### Final Answer:
The object should be placed between the focal length (F) and the lens (pole) to obtain a magnified image in a simple microscope.

---