RAJIV GANDHI UNIVERSITY OF HEALTH SCIENCES
II Year B.Sc Radiography Degree Examination OCT-2019
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Time: 3 Hours Max.Marks:80
BASIC RADIATION PHYSICS
Q.P.CODE:2204
Your answers should be specific to the questions asked.
Draw neat labeled diagrams wherever necessary. Answer all questions
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LONG ESSAYS (Answer any two) 2X10=20 Marks
- Write in detail about the construction and working of a rotating anode x-ray tube. (10)
- Explain the principle, construction and operation of a High Tension transformer. (10)
- Describe the three important methods by which x-rays and gamma rays interact with the medium. (10)
SHORT ESSAYs (Answer any Ten) 6X5=50 Marks
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- What are the important properties of x-rays.
- What is the principle of operation of a low tension transformer.
- What is meant by stochastic and non-stochastic effect and give examples.
- What is meant by Maximum Permissible Dose and mention the dose limits for radiation workers and public?
- How fluoroscopic Rating charts are useful.
- Briefly write about characteristics of grids.
- Write about the principle of operation of full wave rectifier circuit.
- Briefly write about the principle of operation of a image intensifier tube.
- How the tube current is controlled in an x-ray circuit.
- Write about the principle and operation of a TLD badge.
- How radiation and optical field alignment is checked in the x-ray unit.
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SHORT ANSWERS 5X2=10
- Half life
- Rectifiers
- Atomic number
- Use factor
- Heel effect
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