A particle of mass m, charge q and kinetic energy T enters in a transverse uniform magnetic field of induction B. After the 3 s, the kinetic energy of the particle will beA. TB. 4 TC. 3 TD. 2 T

A particle of mass m, charge q and kinetic energy T enters in a transv

1.	A particle of mass m, charge q and kinetic energy T enters in a transverse uniform magnetic field of induction B. After the 3 s, the kinetic energy of the particle will beA. TB. 4 TC. 3 TD. 2 T
Answer» Correct Answer - A `vecF=q(vec vxxvecB)`, i.e. magnetic force is perpendicular to both velocity and magnetic field. A force `_\|__(r)`, to `vecV` does no work or no power delivered by force which is `_\|__(r), vecVA` hence no kinetic energy or speed will change since `P=vecF.vecV=0` As `vecF _\|__(r),vecV_\|__(r),vec(dr)` or `dW=vecF.vec(dr)=0`

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A particle of mass m, charge q and kinetic energy T enters in a transverse uniform magnetic field of induction B. After the 3 s, the kinetic energy of the particle will beA. TB. 4 TC. 3 TD. 2 T

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