Question

1) How do you confirm whether a body is positive or Negative charged using electroscope ?
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Answer 1

Explanation:

Now the electroscope will allow you to identify whether an object is positively or negatively charged. If you bring a negative object near the electroscope, the electrons in the scope will be repelled toward the leaves, balancing the charge. The leaves will move toward each other.

If you bring a positive object near the electroscope, it will attract the electrons toward the terminal. The leaves will move away from each other.

You can also use this process with a positive object to charge the electroscope. In this case, grounding the electroscope with your finger will allow extra electrons to move to the electroscope, which will become negatively charged.

Further investigation

Static electricity is an interesting phenomenon, and that's probably all many of us think about it—it's interesting but not very useful. However, we know that without current electricity to power our homes and run our computers and cell phones, our lives would be very different. The electric technologies we rely on every day couldn't have been built without some early scientist taking an interest in static electricity.

Static electricity can be beneficial or damaging. Some smoke stacks use electrostatic devices called scrubbers to help remove particulates from the smoke. Static electricity can damage the circuitry in some electronic devices. Therefore, parts for a computer might be shipped in special packaging to prevent damage from static electricity.

What other uses have scientists found for static electricity? Can you come up with an experiment to develop your own triboelectric series?

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