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If an electron describes half a revolution in a circle of radius 'r' in a magnetic field 'B' , the energy aquired by it is a. zero b, 1/2(mv 2 ) c.1/4(mv 2 ) d. (Bev) r I know the answer...but I dunno its reason...so plz help me in this..


If an electron describes half a revolution in a circle of radius 'r' in a magnetic field 'B' , the energy aquired by it is
 
a. zero                            b, 1/2(mv2)
 
c.1/4(mv2)                      d. (Bev)r
 
I know the answer...but I dunno its reason...so plz help me in this..


Grade:10

1 Answers

ROSHAN MUJEEB
askIITians Faculty 829 Points
one year ago
zero,as magnetic field does no work

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