An electron beam is moving between two parallel plates having ele… - Vidyadip

MCQ

An electron beam is moving between two parallel plates having electric field $1.125 \times {10^{ - 6}}N/m$. A magnetic field $3 \times {10^{ - 10}}T$ is also applied so that beam of electrons do not deflect. The velocity of the electron is ............ $m/s$

A
$4225$
✓
$3750$
C
$2750$
D
$3200$

✓

Answer

Correct option: B.

$3750$

b
(b) $v = \frac{E}{B} = \frac{{1.125 \times {{10}^{ - 6}}}}{{3 \times {{10}^{ - 10}}}} = 3750\,m/s$

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