The voltage V is the voltage differencebetween the emitter (of electrons) and th

Question

The voltage V is the voltage differencebetween the emitter (of electrons) and the collector. In the picture it will attract the electrons so they have more kinetic energy when they arrive at the collector than they had when they left the emitter. For the rest of this problem, consider the voltage reversed, so that electrons that are emitted are repelled. a) If K is the kinetic energy an electron has when it leaves the emitter headed toward the collector, then what is its kinetic energy just before it reaches the collector? Write an equation using K, the magnitude of the voltage l V l, and e (the charge on an electron is -e).

Explanation / Answer

he voltage V is the voltage differencebetween the emitter (of electrons) and the collector. In the picture it will attract the electrons so they have more kinetic energy when they arrive at the collector than they had when they left the emitter. For the rest of this problem, consider the voltage reversed, so that electrons that are emitted are repelled. a) If K is the kinetic energy an electron has when it leaves the emitter headed toward the collector, then what is its kinetic energy just before it reaches the collector? Write an equation using K, the magnitude of the voltage l V l, and e (the charge on an electron is -e).

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