Question

An electron moves with constant velocity $V$ parallel to the direction of uniform magnetic field $B$. The force experienced by the electron is):

• A. $BeV$
• B. $\frac{eV}{B}$
• C. $\frac{B}{eV}$
• D. zero

Answer 1

The correct option is D zero

Given: velocity is parallel to magnetic field

Solution: By using the formula of force experienced by moving charge in uniform magnetic field : F=q$(V\times B)$

F=qVBsin$\theta$

As given in the questionvelocity is parallel to magnetic field so,

$sin\theta =0^0$=0

Now the force will also be 0

Hence the correct option is D