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Electricity

Blazing goIITian

 Joined: 1 Apr 2012 Post: 381
7 Jun 2012 19:13:11 IST
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Engineering Entrance , Medical Entrance , AIPMT , JEE Main , AIIMS , JEE Advanced , Physics , Electricity

Two small iron particles each of mass 280 mg, are placd at a distance 10cm apart. If 0.01% of the electron of one particles are transferred to the other, find electron forces between them. Atomic weight of iron is 56gmol^-1 and there are 26 electron in each atom of iron

Blazing goIITian

Joined: 22 May 2009
Posts: 2467
8 Jul 2012 18:40:48 IST
0 people liked this

Here

The charge on each sphere

q=(280*10^-3/56)*6.023*10^23*26*0.0001*1.6*10^-19

F=k*q^2/r^2

Now find the force

using the calculated value for q and r=0.1m.

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