What is the change in kinetic energy of a proton when it is accelerated through a potential difference of 2MV?
Correct answer: C. 0.32 pJ
- A. 0.32 μJ
- B. 0.32 nJ
- C. 0.32 pJ
- D. 0.32 fJ
Explanation
Change in Kinetic energy is equivalent to work done.We know that W = VqWhere W is the work done, V is the potential difference through which the charged particle is accelerated, and q is the magnitude of charge.W = 2x106 (1.6x10-19) = 3.2x10-13J = 0.32 pJ
Last updated
About Electric Potential
Electric potential is the work done per unit positive charge in bringing it from infinity to a point, while potential difference compares energy change between two points. Work includes potential due to point charges, superposition of scalar potentials, equipotential surfaces, and the relation between electric field and potential.
Practise Electrostatics
831 free Electrostatics MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Physics questions like this
Physics is on 13 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
A battery is marked 9.0V. What does this mean?
A battery of electromotive force 18 V delivers a charge of 1.5 C to an external circuit.The total energy dissipated in the circuit is
A particle, carrying a charge of 5e, falls through a potential difference of 25 V. What would be energy acquired by the particle in 'J'.
A particle carrying charge of 2e falls through a potential difference of 3.0 V. Calculate the energy required by it
An electron volt is the energy gained by an electron when it moves through a potential difference of