Give reasons for each of the following.
The leaves of an electroscope are placed inside an insulated glass jar.

Explanation

### Step-by-Step Solution:

1. **Understanding the Electroscope**:
- An electroscope is a device used to detect the presence of electric charge. It consists of a metal rod connected to two thin metal leaves. When a charged object is brought near the electroscope, the leaves will either diverge (spread apart) or come together, indicating the presence of charge.

2. **Purpose of Insulation**:
- The question asks why the leaves of an electroscope are placed inside an insulated glass jar. The primary reason for this is to prevent any external electric currents or influences from affecting the electroscope's readings.

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