1.

An electron moves with a constant speed v along a circle of radius r. Its magnetic moment will be ______ . (e is the electron's charge.)

Answer»

evr
`1/2evr`
`PIR^(2)EV`
`2pirev`

Solution :N = 1
`A=pir^(2)`
Magnetic moment m = NIA
`thereforem=I(pir^(2))`
An ELECTRON moves with a CONSTANT SPEED v along a circle of radius r. The current produced,
`I=(ev)/(2pir)`
`thereforem=(ev)/(2pir)xxpir^(2)`
`thereforem=1/2evr`


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