Question

how is the unit of electron volt (eV) related to the S.I. unit of energy​

Answer 1

Dear Student,

◆ Answer -

1 eV = 1.6×10^-19 J

● Explanation -

1 electron volt is the work done on an electron in accelerating it through a potential difference of one volt.

We know that,

Work done = charge × voltage

U = e × V

U = 1.6×10^-19 × V

Hence,

1 eV = 1.6×10^-19 J

Thanks dear. Hope this helps you...

Answer 2

Given : How is the unit of electron volt (eV) related to the S.I. unit of energy.

To find : Prove the unit of 1 electron volt.

Using work done formula :

★ Work done = Charge × Voltage.

• here, work done is the unit and 'e' is the charge and 'v' is the volt.

Terms :

• ev = electron volt.
• here, we need to find for 1 ev.

Calculations :

→ Unit = e × V

→ Unit = 1.6 × 10^-19 × 1J

The approx, value of one electron and volt is equal to 1.6×10^-19 J.