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An electron (mass = 9xx10^(-31)kg, charge = 1.6xx10^(-19)C) whose kinetic energy is 7.2xx10^(-18)joule is moving in a circular orbit in a magnetic field of 9xx10^(-5)Wb//m^(2). The radius of the orbit is _____ . |
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Answer» 1.25 cm `q=1.6xx10^(-19)C` `m=9xx10^(-31)kg` `B=9xx10^(-5)Wb//m^(2)` Radius of CIRCULAR path `r=sqrt(2mE)/(qB)` `thereforer=sqrt((2xx9xx10^(-31)xx7.2xx10^(-18))/(1.6xx10^(-19)xx9xx10^(-15)))` = 0.25 m = 25 cm |
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