Concept:X-rays are produced when high-speed electrons are suddenly stopped by a metal target inside an X-ray tube.
Explanation:In an X-ray tube, a heated filament releases electrons.
These electrons are accelerated to very high speeds using a high voltage.
They then collide with a metal target and are rapidly brought to rest.
During this sudden deceleration, the kinetic energy of the electrons is converted into X-ray photons.
This mechanism is called bremsstrahlung radiation.
Hence, X-rays are generated when a metal target blocks fast-moving electrons.
Answer:Option B: are produced when a metal target is used to block fast-moving electrons.