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A particle having charge q=10muC and mas...

A particle having charge `q=10muC` and mass m = 3 mg has a velocity `vecv` = (10 cm) `(hati+2hatj)` at t =0 at origin. There exists a uniform magnetic field `vecB=0.6 piT hati`. Another uncharged particle is moving with a constant velocity along negative x-axis. At t =0 its x coordinate is +50 cm. The two particles collide and stick together and the combined mass goes in a circular path. Find the possible values of the mass of the uncharged particle .

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The correct Answer is:
3/4 , 2, 9/2 or 12 milligram
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