How much kinetic energy will be gained by an (alpha) particle ion going from a point at 70 V to another point at 50 V ?
Correct answer: A. 40 eV
- A. 40 eV
- B. 40 KeV
- C. 40 MeV
- D. Zero
Explanation
A K.E is equal to EPE i.e qAV so 2e x 20V= 40 eVAs it is numerical, it can have only one possible answer.
This question appeared on the ETEA MDCAT 2017 paper, which you can sit online with every answer explained.
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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.
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