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| 1. |
Describe to make the sample of the following. |
| Answer» <html><body><p>tion:It is an instrument used to detect electric charges.A <a href="https://interviewquestions.tuteehub.com/tag/simple-1208262" style="font-weight:bold;" target="_blank" title="Click to know more about SIMPLE">SIMPLE</a> electroscope can be constructed as follows.Take a glass container.Insert a metal wire inside it.To the ends of the wire, which are inside the jar, attach 2 metal <a href="https://interviewquestions.tuteehub.com/tag/plates-1156478" style="font-weight:bold;" target="_blank" title="Click to know more about PLATES">PLATES</a>(say aluminium plates).The other end is outside the glass container is connected or brought in contact with charged body. The electroscope <a href="https://interviewquestions.tuteehub.com/tag/detects-437899" style="font-weight:bold;" target="_blank" title="Click to know more about DETECTS">DETECTS</a> charge in the following way:A charged object is brought in contact with the open end of the wire .The charges are transferred via the wire which is a good conductor of electricity.The aluminium plates <a href="https://interviewquestions.tuteehub.com/tag/also-373387" style="font-weight:bold;" target="_blank" title="Click to know more about ALSO">ALSO</a> get charged and since they are similarly charged, they repel and move away from each other.This confirms the presence of charge on the body.Grounding & DischargingIf the charged body was brought close to the electroscope and then, we simultaneously touch the metal plates with your hand, then this would cause the charges to flow through your body ( your body is a good condutor of electricity) to the ground. This is <a href="https://interviewquestions.tuteehub.com/tag/called-907796" style="font-weight:bold;" target="_blank" title="Click to know more about CALLED">CALLED</a> grounding. The plates no longer repel because their charges are 'discharged' to the ground because of grounding.</p></body></html> | |