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pallavi pradeep bhardwaj Grade: 12
        

Two copper balls each weighining 10g are kept in air 1 cm apart If one electron from every 10^6 atoms is transfered from one ball to the other the coloumb force between them is

7 years ago

Answers : (1)

Badiuddin askIITians.ismu Expert
147 Points
										

Dear pallavi


molecular weight = 63.55


so mass of 1 mole of cu is =63.55


 in 63.55 g number of cu atom   = 6.022 X 1023 


 in 10 g number of cu atom   = 10*6.022/63.55  X 1023 =1.00 X 10 23


  number of electron tranfered  = 10 23   / 106


                                             =1017


so charged genereted in one ball is q  =1.6 X 10-19  X 1017


                                                   =1.6 X 10-2 C


so force F = 1/4∏ε qq/r2


              =9 X 109 * (1.6 X 10-2 )2 / 10-4


              =2.304 1010 N


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Badiuddin

7 years ago
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