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a long cylendrical wire of a +ive chage with linear carge density =2*10to power-8 has an electron revolving around in circular pathunder the influencce of electrostatic force find the k.e of electron .??
ans.2.88*10to power-17
it is indipendent o
We know that the electric field of a cylinder is λ/2∏εr.
Then force will be equal to λq/2∏εr.. Since F=qE.
Also, this should be equal to the centrifugal force.
Therefore,
λq/2∏εr.=mv2/r
λq/2∏ε=mv2
Substitue the values and you can get the answer.
λ= 2x10-8
q=1.6x10x-19
ε=8.8x10x-12
m=9.1x10-31
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