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Q)

A particle is projected perpendicular to a uniform magnetic field. The area bounded by the trajectory of the particle is directly proportional to

$\begin {array} {1 1} (a)\;Velocity & \quad (b)\;Momentum \\ (c)\;Kinetic\: Energy & \quad (d)\;None \: of\: these \end {array}$

 

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A)
$A\: \alpha\: R^2$  and R = m V/qB
$R\: \alpha\: V \Rightarrow A \: \alpha\: V^2$
Ans : (c)

 

 
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A)
The momentum
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