Atomic StructureHard

Question

An electron at rest is accelerated through a potential di­fference of 200 V. If the specific charge of electron is 1.764 × 1011 C/kg, then the speed acquired by the electron is about

Options

A.8.4 × 106 cm/s
B.8.4 × 106 m/s
C.4.2 × 106 m/s
D.4.2 × 106 cm/s

Solution

$eV = \frac{1}{2}mv^{2} \Rightarrow v = \sqrt{2 \times \frac{e}{m} \times V} = \sqrt{2 \times 1.764 \times 10^{11} \times 200} = 8.2 \times 10^{6}\text{ m/s}$

Create a free account to view solution

View Solution Free
Topic: Atomic Structure·Practice all Atomic Structure questions

More Atomic Structure Questions

Rutherford,s experiment, which established the nuclear model of the atom, used a beam of :...The escape velocity for earth is 11.2 km/s. The orbit number for H-atom in which speed of electron is about 19.54 times ...A proton and an α-particle are accelerated through the same potential di­fference. The ratio of their de Broglie wavelen...Iron exhibits bcc structure at room temperature. Above 900°C, it transforms to fcc structure. The ratio of density o...The wave number of electromagnetic radiation emitted during the transition of electron in between two levels of Li2+ ion...