Question

16
What is the effect of motion on charge q and a mass m of an electron moving with a speed of
109 m/s?

Answer 1

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Answer 2

Motion of electron

Explanation:

• We know that, the mass of an electron(m) = $9.1 \times 10^{-31}$kg and it has a charge of (q) = $1.6 \times10^{-19}$C moving with speed = 109 m/s
• From this information, we know that the electron must possess some kinetic energy that can be calculated as shown below,

$k.e = \frac{1}{2}mv^{2}$

on putting values

$k.e = \dfrac{1}{2}9.1\times10^{-31} (109)^{2}$

$= 5.405 \times 10^{-27}$J

• Also, when this electron is placed in an electrical and magnetic field the motion will be different.
• Some points of difference have been mentioned below.