Solve
Guides
0
You visited us 0 times! Enjoying our articles? Unlock Full Access!
Standard XII
Physics
NCERT
Question

The kinetic energy of an electron, which is accelerated in the potential difference of 100V, is :
  1. 1.6×10−17J
  2. 1.6×10−14J
  3. 1.6×10−8J
  4. 1.6×10−10J

A
1.6×10−10J
B
1.6×10−17J
C
1.6×10−14J
D
1.6×10−8J
Open in App
Solution
Verified by Toppr

The definition of 1eV is:
It is the kinetic energy acquired by an electron which has been accelerated from rest in a potential difference of 1V.
Thus, in this case, the kinetic energy of the electron will be 100eV
=1.6×10−19×100
=1.6×10−17J

Was this answer helpful?
1
Similar Questions
Q1
An electron (charge = 1.6×10−19C is accelerated through a potential of 100,000 V. The energy acquired by the electron is

1.6×10−24J

  • 1.6×10−14erg

  • 0.53×10−17J
  • 1.6×10−14J
    • View Solution
    Q2
    One eV (electron volt) of nuclear energy is equivalent of:

    (a) 1.6 × 10−14 J
    (b) 1.6 × 10−12 J
    (c) 1.6 × 10−19 J
    (d) 1.6 × 10−13 J
    View Solution
    Q3

    The work function of a metal is 4.2 eV. If the radiation with wavelength 2000 0A falls on the metal surface then the kinetic energy of fastest photo electron will be:


    View Solution
    Q4
    The de-Broglie wavelength of a proton (charge=1.6×10−19C,mass=1.6×10−27kg) accelerated through a potential difference of 1 kV is :
    View Solution
    Q5

    An electron initially at rest is accelerated through a potential difference of 1 V. The energy gained by the electron is:


    View Solution