Question

Как с помощью электроскопа определить знак неизвестного заряда? Ответьте как можно короче)

Answer 1

Определить знак заряда на электроскопе можно с помощью другого заряженного тела с известным знаком, поднеся его к электроскопу:
1. Лепестки электроскопа разойдутся сильнее - значит, оба заряда одного знака.
2. Угол между лепестками уменьшится - значит, оба заряда разного знака 

Answer 2

How to determine the sign of an unknown charge using an electroscope?

To determine the sign of an unknown charge using an electroscope, you can follow these steps:

1. Start with a neutral electroscope. This means that the leaves of the electroscope are hanging straight down, indicating no charge.

2. Bring the unknown charge close to the electroscope without touching it. The charge can be a charged object or a charged body.

3. Observe the behavior of the electroscope's leaves. If the leaves repel each other and spread apart, it indicates that the unknown charge has the same sign as the charge on the electroscope. If the leaves attract each other and come closer together, it indicates that the unknown charge has the opposite sign to the charge on the electroscope.

4. Repeat the process with known charges of different signs to confirm the result.

Remember, this method provides a qualitative determination of the sign of the charge and does not give the exact value of the charge.