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# Velocity and acceleration vectors of charged particle moving perpendicular to the direction of a magnetic field at a given instant of time are $\overrightarrow v=2 \hat i+c \hat j$ and $\overrightarrow a=3 \hat i+4 \hat j$ respectively. Then the value of c is

$\begin {array} {1 1} (a)\;3 & \quad (b)\;1.5 \\ (c)\;-1.5 & \quad (d)\;-3 \end {array}$

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(c) -1.5
answered Nov 7, 2013 by

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