First slide

Potential energy

Question

How much kinetic energy will be gained by an a-particle in going from a point at 70 V to another point at 50 V ?

Easy

A

40 eV
B

40 keV
C

40 MeV
D

0 eV

Solution

$KE = q (V_{1} - V_{2}) = 2 \times 1.6 \times 10^{- 19} \times (70 - 50) = 40 eV$

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