Velocity and acceleration vector of a ch...

Velocity and acceleration vector of a charged particle moving in a magnetic field at some instant are `vecv=3hati+4hatj and veca=2hati+xhatj`. Select the correct options.

`x=-1.5`

`x=3`

Magnetic field is along z-direction

Kinetic energy of the particle is constant

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The correct Answer is:

a,c,d

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