A simple apparatus to detect
charge on a body is the gold-leaf electroscope. It consists of a vertical metal rod housed in a box, with two
thin gold leaves attached to its bottom end.
When a charged object touches
the metal knob at the top of the rod, charge flows on to the leaves and they
diverge. The degree of divergence is an indicator of the amount of charge.
The gold leaves are extremely thin conducting foils which have low mass per unit area and are flexible, therefore, they respond very quickly to small electrostatics forces.
This instrument can also be
used check the polarity of charge and to
measure the potential difference.
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Some of these questions which may be asked in your Board Examination 2012-2013
Q1: Can we use aluminium leaves instead of gold leaves in Gold Leaf Electroscope?
Q2: Why gold leaves are preferred for Gold Leaf Electroscope?
Q3: What is the basic purpose of Gold Leaf Electroscope?
Q4: How can we check the polarity of charge by Gold Leaf Electroscope?
Answer these questions in comment box and help your friends
ANS 1:yes,we can use aluminium foil
ReplyDeleteANS 2:gold leaves are preffered bcz they donot corrode and could be easily hammered into thin sheets.
ReplyDeleteANS 3:the basic purpose is to find out whether the charge is present on any thing or not..it can also be used to find the polarization of charges and the electric potential of the charges.
Thnks
DeleteGOLD is only an Metal which can be soo thin .
ReplyDeleteAluminum is not thin like gold.
2. Same reason.
3 To dectect charge.
4. Gold leave diverge show this.
Gold is very sensitive to the charge
ReplyDeleteSuperb article and I would really like to thank for your article on gold leaf electroscope. it’s really helpful. Looking forward to your blog.
ReplyDelete