A charged particle having mass equal to 1000 times of an electron and a charge same as that of an electron is accelerated through a potential difference of 1000 V. Calculate the velocity attained by the charged particle and kinetic energy in terms of electron volts and joules.
Chapter 3
Q. 3.2
Step-by-Step
Verified Solution
The mass of the charged particle = 1000 times the mass of an electron
= 1000 × 9.1 × 10^{–31} = 9.1 × 10^{–28} kgThe charge of the particle = 1.602 × 10^{–19} C
Therefore, the velocity, v=\sqrt{\frac{2qV}{m} }=\sqrt{\frac{2\times 1.602\times 10^{-19}\times 1000 }{9.1\times 10^{-28} } }=0.596\times 10^{6}ms^{-1}
Kinetic energy = q × V
=1.602 × 10^{–19} × 1000 = 1.6 × 10^{–16} J = 1000 eV