Q. 375.0( 2 Votes )

(a) An electron moves along a circle of radius 1 m in a perpendicular magnetic field of strength 0.50 T. What would be its sped? Is it reasonable?

(b) If a proton moves along a circle of the same radius in the same magnetic field, what would be its speed?

Answer :

Given-



(a) For electron


Radius of the circle = 1 m



Magnetic field strength = 0.50 T


Now,



The radius of the circle is given by,



where,


m is the mass of a electron


v= velocity of the particle


B = magnetic force


q= charge on the particle = C






Speed of light is 3x108 m/s2


Here, the speed of the electron moving along the circle is greater than the speed of light, so it is not reasonable.


(b) For a proton,


The radius of the circle is given by,



where,


m is the mass of a proton


v= velocity of the particle


B = magnetic force


q= charge on the particle = C






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