Courses
Courses for Kids
Free study material
Offline Centres
More
Store Icon
Store
seo-qna
SearchIcon
banner

1 MeV is equal to:
A. 1.6×1019J
B. 1.6×1014J
C. 1.6×1013J
D. 1.6×1013J

Answer
VerifiedVerified
522.9k+ views
like imagedislike image
Hint: Electron volt is the amount of work required to move an electron across a potential difference of 1 volt. To get 1 MeV we have to multiply the electron volt value with 106.

Complete step by step answer:
Electron volt (eV) is a unit of energy, which is equal to the work done on an electron to move across a potential difference of 1 volt.
1eV=1.602×1019joules
Therefore,
1MeV=1.602×1019joules×106
1MeV=1.602×1013joules
So, the correct option is C.

Additional information:
Electron volt is advised to use in electrostatics since the charge can be quoted in integer units of elementary charge.
Alternatively, we can define electron volt as the kinetic energy acquired by an electron when it is accelerated through a potential difference of one volt. Since the charge on an electron is negative, it requires work to shift an electron from a high potential to a lower potential.
The electric potential at a point in an electric field is defined as the work done in bringing a unit positive charge from infinity to the point. It is a scalar quantity. The potential at infinity will be zero.
Change in electric potential energy will be equal to the negative work done by the electric field. If an electric field does a positive work then electric potential will be negative. If an electric field does a negative work then electric potential energy will be positive. The electric potential energy of a charged particle in an electric field depends not only on the electric field but also the charge of the particle.
We can write the equation of electric potential as,
V=Uq, where V is the electric potential and U is defined as electric potential energy.
The electric potential has a value everywhere in space but has no direction.

Note: Students are advised to multiply the electron volt with 106 to get 1MeV. The options will confuse candidates, because 1.602×1019joules is also there. It is actually 1 eV It is one million times of electron volt.
Latest Vedantu courses for you
Grade 11 Science PCM | CBSE | SCHOOL | English
CBSE (2025-26)
calendar iconAcademic year 2025-26
language iconENGLISH
book iconUnlimited access till final school exam
tick
School Full course for CBSE students
PhysicsPhysics
ChemistryChemistry
MathsMaths
₹41,848 per year
Select and buy