A-LevelPhysicsWork, energy and power9702/12 · May/June 2010 · Q41 Mark
An ion is accelerated by a series of electrodes in a vacuum. A graph of the power supplied to the ion is plotted against time. What is represented by the area under the graph between two times?
Athe change in kinetic energy of the ion
Bthe average force on the ion
Cthe change in momentum of the ion
Dthe change in velocity of the ion
✓ Correct answer
A: the change in kinetic energy of the ion
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