Home » Modern Physics » Dual Nature of Radiation and Matter » Question

Dual Nature of Radiation and Matter

Easy Questions

Modern Physics

Dual Nature of Radiation and Matter
Atoms
Nuclei
Semiconductor Electronics : Materials, Devices and Simple Circuits
  1. An electron of mass m and charge e is accelerated from rest through a potential difference of V volt in vacuum. Its final speed will be
    1. eV
      2m
    2. eV
      m
    3. 2eV
      m
    4. eV
      2m
Correct Option: C

Kinetic energy of electron accelerated through a potential V= eV

⇒
1
mv2 = eV
2

⇒ v2 =
2eV
m

⇒ v =
2eV
m


Your comments will be displayed only after manual approval.