Approximately what percentage of the energy deposited in the target by electrons is converted to x-rays?

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Multiple Choice

Approximately what percentage of the energy deposited in the target by electrons is converted to x-rays?

Explanation:
Only a small portion of the incident electron energy becomes x-ray photons. When high-energy electrons strike the target, the vast majority of their energy is transformed into heat within the target material through collisions. A much smaller fraction is emitted as x-ray photons through bremsstrahlung and characteristic interactions, and at typical tube voltages this efficiency is about 1 percent. The remaining roughly 99 percent heats the target, which is why x-ray tubes rely on cooling and often rotating anodes to manage the heat load.

Only a small portion of the incident electron energy becomes x-ray photons. When high-energy electrons strike the target, the vast majority of their energy is transformed into heat within the target material through collisions. A much smaller fraction is emitted as x-ray photons through bremsstrahlung and characteristic interactions, and at typical tube voltages this efficiency is about 1 percent. The remaining roughly 99 percent heats the target, which is why x-ray tubes rely on cooling and often rotating anodes to manage the heat load.

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