What is an Electron Volt a Unit of?
Answer – An electron volt is a unit of energy. It is denoted by eV.
Explanation:
An electron volt is a commonly used measure of energy. It is represented by eV and is defined as the amount of energy required to move an electron through a one volt potential difference. Used extensively in nuclear and atomic physics, this unit is often employed in the context of chemical reactions and when considering the movement of electrons toward and away from the nucleus.
An electron volt is alternatively also defined as the amount of kinetic energy an electron gains when it is accelerated by a one volt potential difference. Therefore:
, since
Further, as the SI unit of energy is joule, it is useful to know how to convert electron volts to joules. For this, we apply the definition of electron volt to the formula , where E is energy, q is charge, and V is the potential difference.
This would mean substituting , (charge of an electron), and in the above formula as follows:
Substituting , we get:
Thus,
Popular Questions
- Shown in the figure is a collection of two charges labeled as g, and g2. Also labeled is the “Point P”, which is where we will do our calculations. To understand the notation, please note the following: 92 (X2, V2) 91 (X1, 0) (Xp, 0) not to scale • The vector E means the electric field at P due only to q1. • The vector E2 means the electric field at P due only to q2. • The vector Etot means the total electric field at P due to all charges. Item Charge (C) (х,у) m ( 6.63 , 0.00 ) P None q1 -6.14e-06 ( -2.13 , 0.00 ) q2 3.47e-06 (1.40 , 2.71 ) Determine the distance from q, to P: r, = Determine the distance from q, to P: r, = Determine the magnitude of E1. | E1 | = Determine the magnitude of E2. | E | Fill in the following table with all the appropriate components: Item x-component (N/C) y-component (N/C) E1 E2 Etot.
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