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Velocity and acceleration vectors of cha...

Velocity and acceleration vectors of charged particle moving perpendicular to the direction of magnetic field at a given instant of time are `vartheta= 2hat(i) + c hat(j) and bar(a) = 3 hat(i) + 4 hat(j)` respectively. Then the value of .c. is

A

3

B

1.5

C

`-1.5`

D

`-3`

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The correct Answer is:
C
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