A) 5000 eV
B) \[8\times {{10}^{-15}}\]J
C) 5000 J
D) 50,000 J
Correct Answer: B
Solution :
Kinetic energy \[K=Q.V\Rightarrow K=\text{ }\left( +e \right)\text{ }\left( 50000V \right)\] \[=\text{ }50000eV=\text{ }50000\times 1.6\times {{10}^{19}}J=\text{ }8\times {{10}^{15}}J\]
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