First slide

Potential energy

Question

A proton is accelerated through 50,000 V. Its energy will increase by

Easy

A

5000 eV
B

8 x l0^-15J
C

5000 J
D

50,000 J

Solution

Kinetic energy K = Q. V ⇒ K = (+e) (50000 V) = 50000 eV = 50000 X 1.6 X 10^-19 J = 8 X 10^-15 J

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