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Q117
(CISF/2017)
Science & Technology › Basic Science (Physics, Chemistry, Biology)
Which one of the following is the measuring unit of X-Rays ?
Result
Your answer:
—
·
Correct:
D
Explanation
The Roentgen (R) is the traditional unit of measurement for exposure to ionizing radiation, specifically X-rays and gamma rays. It is named after Wilhelm Conrad Röntgen, the German physicist who discovered X-rays in 1895. The unit measures the amount of ionization produced by radiation in a unit mass of air.
- Ohm: This is the SI unit of electrical resistance.
- Centimetres: This is a unit of length in the metric system (CGS system).
- Volts: This is the SI unit of electric potential, potential difference, and electromotive force.
While modern SI units such as the Gray (Gy) for absorbed dose and the Sievert (Sv) for equivalent dose are now standard in radiation protection, the Roentgen remains the classic unit associated with X-ray exposure in basic physics.
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