Q.

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

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a

40 eV

b

40 keV

c

40 MeV

d

0 eV

answer is A.

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Detailed Solution

KE=q(V1−V2)=2×1.6×10−19×(70−50)=40 eV
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