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Electroscope - Some Natural Phenomena, Class 8 Science Video Lecture

FAQs on Electroscope - Some Natural Phenomena, Class 8 Science Video Lecture

1. What is an electroscope and how does it work?

Ans. An electroscope is a scientific instrument that is used to detect and measure electric charge. It consists of a metal rod or disk with thin metal leaves attached to its bottom end. When a charged object is brought near the electroscope, the leaves either spread apart or come closer together, indicating the presence of an electric charge. This is due to the transfer of charge from the charged object to the electroscope.

2. Can an electroscope detect both positive and negative charges?

Ans. Yes, an electroscope can detect both positive and negative charges. When a positively charged object is brought near the electroscope, the leaves of the electroscope spread apart. On the other hand, when a negatively charged object is brought near the electroscope, the leaves come closer together. The direction of the charge determines the behavior of the leaves.

3. How can an electroscope be used to determine the nature of charge on an object?

Ans. An electroscope can be used to determine the nature of charge on an object by a process called charging by induction. If a negatively charged object is brought near the electroscope, the leaves will repel each other, indicating a negative charge. Similarly, if a positively charged object is brought near the electroscope, the leaves will come closer together, indicating a positive charge.

4. Can an electroscope be used to measure the amount of charge on an object?

Ans. No, an electroscope cannot directly measure the amount of charge on an object. It only indicates the presence or absence of an electric charge. However, the extent to which the leaves of the electroscope spread apart or come closer together can give a rough idea of the amount of charge. To measure the exact amount of charge, more precise instruments such as an electrometer are needed.

5. What are the practical applications of an electroscope?

Ans. The electroscope has various practical applications in science and engineering. It is used in experiments to demonstrate the presence and behavior of electric charges. It is also used in detecting and diagnosing electrical faults in equipment and circuits. Additionally, the electroscope is used in the calibration of other electrical instruments.

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