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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