Draw a labeled diagram of a gold leaf electroscope. describe how will you use it to detect a charge, measure a charge,and find the nature of charge.

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An electroscope is an early scientific instrument that is used to detect the presence and magnitude of electric charge on a body. It was the first electrical measuring instrument. The first electroscope, a pivoted needle called the versorium, was invented by British physician William Gilbert around 1600.

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HOW TO DETECT THE CHARGE :-
In order to identify the charge of a body we should use a charged electroscope. Let us say the electroscope is negatively charged.

Now bring the unknown charged body 'X' near the cap of the electroscope.

If the leaves diverge more the charge in 'X' must be negative. Suppose that the leaves close a little when 'X' is brought near 'C', then 'X' may have a positive charge or it may not have any charge.

In order to confirm the positive charge you must bring the rod 'X' near the cap of a positively charged electroscope.

If the leaves diverge more, then 'X' has positive charge.

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By measuring the potential difference between the leaf and the base (or earth), the gold leaf electroscope measures the charge.
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Briefly describe what a zygote goes through from its formation to development into a baby
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This is gold leaf electroscope 
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