Which device provides the high voltage required for electron acceleration?

• A. Filament
• B. Anode
• C. High voltage transformer
• D. Turbine

Answer: (C)

To accelerate electrons, you need a large potential difference that creates a strong electric field between the cathode (where electrons originate) and the anode (which attracts and accelerates them). The device that actually provides that large voltage is the high voltage transformer, which steps up the mains power to the kilovoltage range used to drive acceleration. The filament is just the electron source (heated to emit electrons), not the voltage provider. The anode serves as the positive electrode that the electrons are accelerated toward, but it doesn’t generate the high voltage by itself. A turbine may power the system, but the component delivering the high voltage to the tube is the high voltage transformer.