Answer
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Hint: Electron volt has a relationship with the mass of the electron and the kinetic energy of the electron. This relationship can help solve this question.
Complete step by step solution:
We know that electron volt is a unit of energy or work. The work required to move an electron through a potential difference of one volt is an electron volt(eV). So, we can write the equation as
\[w=eV\]
Here e is the charge and V is the potential difference.
An electron volt is also equal to the kinetic energy that is acquired by an electron when it is accelerated through a potential difference of one volt.
Kinetic energy \[=\dfrac{1}{2}m{{v}^{2}}\],here m is the mass and v is the velocity
So, we can write the equation as
\[eV=\dfrac{1}{2}m{{v}^{2}}\]
\[2eV=m{{v}^{2}}\]
\[{{v}^{2}}=\dfrac{2eV}{m}\]
\[v=\sqrt{\dfrac{2eV}{m}}\]
So, the relationship between the velocity and electron volt is \[v=\sqrt{\dfrac{2eV}{m}}\].
Thus, the correct answer for the reaction is option (c).
Additional Information:
-When electronvolt is used as a unit of energy, 1eV is (in joules) equivalent to numerical value of the charge of an electron in coulombs.
-Electronvolt is also a unit of mass by mass-energy equivalence. It is also used as a unit of momentum in higher energy physics. The momentum of an electron can also be described by dividing energy in eV by the speed of light.
Note: Work is done in the form of kinetic energy by the electron. So we can equate work which is equal to electron volt with the kinetic energy equation.
Complete step by step solution:
We know that electron volt is a unit of energy or work. The work required to move an electron through a potential difference of one volt is an electron volt(eV). So, we can write the equation as
\[w=eV\]
Here e is the charge and V is the potential difference.
An electron volt is also equal to the kinetic energy that is acquired by an electron when it is accelerated through a potential difference of one volt.
Kinetic energy \[=\dfrac{1}{2}m{{v}^{2}}\],here m is the mass and v is the velocity
So, we can write the equation as
\[eV=\dfrac{1}{2}m{{v}^{2}}\]
\[2eV=m{{v}^{2}}\]
\[{{v}^{2}}=\dfrac{2eV}{m}\]
\[v=\sqrt{\dfrac{2eV}{m}}\]
So, the relationship between the velocity and electron volt is \[v=\sqrt{\dfrac{2eV}{m}}\].
Thus, the correct answer for the reaction is option (c).
Additional Information:
-When electronvolt is used as a unit of energy, 1eV is (in joules) equivalent to numerical value of the charge of an electron in coulombs.
-Electronvolt is also a unit of mass by mass-energy equivalence. It is also used as a unit of momentum in higher energy physics. The momentum of an electron can also be described by dividing energy in eV by the speed of light.
Note: Work is done in the form of kinetic energy by the electron. So we can equate work which is equal to electron volt with the kinetic energy equation.
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