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======Home Made Electroscope======


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/* GREY BOX INFORMATION - Required                                                                     */
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**Materials: **{{$demo.materials_description}}\\
**Difficulty: **{{$demo.difficulty_description}}\\
**Safety: **{{$demo.safety_description}}\\
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**Categories:** {{$demo.categories}}
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**Alternative titles:** Electroscope
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/* SUMMARY - Required                                                                                  */
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====Summary====                   
{{$demo.summary}}


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/* PROCEDURE - Optional                                                                                */
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====Procedure====  
  - Straighten a paperclip and bend one end into a “U” shape.  
  - Trace the opening of a transparent jar onto a piece of cardboard and cut out a circular lid.  
  - Make a small hole in the center of the cardboard circle.  
  - Cut two small leaf-shaped pieces of aluminum foil, each with a small hole at the top.  
  - Roll another piece of aluminum foil into a ball to act as the collector.  
  - Insert the straight end of the paperclip through the hole in the cardboard and secure it with tape.  
  - Attach the foil ball to the top of the paperclip.  
  - Hang the two foil leaves from the U-shaped end of the paperclip.  
  - Place the cardboard lid on top of the jar and tape it in place so the foil leaves hang freely inside.  
  - Test the electroscope by charging a comb or balloon (by rubbing with hair or wool) and bringing it near the foil ball. The leaves will spread apart as they acquire like charges.


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====Links==== 
How to make an electroscope - RimstarOrg: 
{{youtube>2PmWlPjV6n0?}}\\
📄 How to Make an Electroscope Easily - AH Electronics (Instructables): [[https://www.instructables.com/how-to-make-an-electroscope-easily/]]\\


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====Variations====
  * Use cassette tape instead of aluminium foil for the leaves.  
  * Test the device with different materials for charging, such as glass, plastic, or wool.


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/* SAFETY PRECAUTIONS - Required                                                                       */
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====Safety Precautions==== 
  * Ensure the jar is stable to prevent breakage.  
  * Do not use the electroscope with high-voltage power sources—it is only safe for static charge experiments.


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====Questions to Consider====
  * Why do the foil leaves repel each other when charge is present?  
  * What happens if you bring a positively charged object near the electroscope?  
  * Why does humidity reduce the effectiveness of the electroscope?  
  * How does the size of the collector affect sensitivity?  
  * How could you improve the design to make the electroscope more accurate?


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/* DEMONSTRATION INFORMATION - Required                                                                */
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/* Complete information in the Demonstration Info box below, following instructions exactly. */