Which of the following apparatus is used to experiment with electric charge ?

Options

A. Gold Leaf Electroscope.
B. PVC Sheets.
C. Glass Apparatus
D. Wooden Block

Explanation

To determine which apparatus is used to experiment with electric charge, we can analyze the given options step by step:

### Step 1: Identify the Options
The options provided are:
1. Gold leaf electroscope
2. PVC sheets
3. Glass apparatus
4. Wooden block

### Step 2: Understand Each Option
- **Gold Leaf Electroscope**: This is a device specifically designed to detect electric charge. It consists of two thin gold leaves that are suspended from a metal rod. When a charged object comes into contact with the metal knob, the charge is transferred to the leaves, causing them to repel each other and move apart.

- **PVC Sheets**: These are often used in experiments related to static electricity but are not a device for measuring or detecting charge. They can be charged by friction but do not indicate the presence of charge on their own.

- **Glass Apparatus**: This is a broad term that could refer to any glass container or tool. While glass can be involved in electrostatic experiments, it is not a specific device for detecting electric charge.

- **Wooden Block**: Similar to PVC sheets, a wooden block does not have the capability to measure or detect electric charge. It may be used in experiments but is not a dedicated apparatus for charge detection.

### Step 3: Conclusion
Based on the analysis, the **Gold Leaf Electroscope** is the only apparatus specifically designed to experiment with electric charge. It can detect the presence of charge and demonstrate the principle of electrostatic repulsion.

### Final Answer
The correct option is **Gold Leaf Electroscope**.

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