A positively charged particle P crosses a region of uniform electric field of intensity $E$ . Velocity $u$ of the particle at the entry on the left side of the region is perpendicular to the electric field as shown in the first figure. Speed of the particle at exit on the right side is $v_{1}$ . Now the experiment is repeated with a uniform magnetic field of induction $B$ superimposed on the electric field as shown in the second figure, keeping entry velocity of the particle unchanged. In this experiment, speed of the particle at exit on the right side is $v_{2}$ . What can you conclude regarding the speeds $v_{1}$ and $v_{2}$ ?

Question

Infinity Learn · Accepted Answer

If $u = \frac{E}{B},$ then $v_{2} < v_{1}$

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If $u < \frac{E}{B},$ then $v_{2} < v_{1}$

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If $u = \frac{E}{B},$ then $v_{2} = v_{1}$

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