# Physics

The anode (positive terminal) of an X-ray tube is at a potential of +115 000 V with respect to the cathode (negative terminal).

(a) How much work (in joules) is done by the electric force when an electron is accelerated from the cathode to the anode?

(b) If the electron is initially at rest, what kinetic energy does the electron have when it arrives at the anode?

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1. (a) multiply the voltage by the electron charge in Coulombs. The answer will be in Joules.

(b) same answer. All work done due to the potential energy change is converted to KE

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2. 78990-

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