Class 12 Physics · Chapter 8 · Test 2
X-rays and CT Scanning
50 MCQs
50 questions · 40 min · 50 marks
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Sample questions
The first 5 of 50. Try each one, then tap to see the answer.
Question 1
In heavy atoms the electron shell closest to the nucleus is the:
- AK-shell
- BL-shell
- CM-shell
- DN-shell
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Answer: A
The shells are labelled K L M N O with K closest to the nucleus.
Question 2
Inner shell electrons are:
- ALoosely bound
- BTightly bound so a large amount of energy is needed to displace them
- CFree to move
- DAbsent in heavy atoms
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Answer: B
Large energy is required to displace tightly bound inner shell electrons.
Question 3
Transitions of inner shell electrons in heavy atoms produce:
- ARadio waves
- BVisible light
- CX-rays
- DInfrared radiation
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Answer: C
Inner shell transitions give high energy photons or X-rays.
Question 4
X-rays from inner shell transitions are called characteristic X-rays because their energies depend on the:
- AVoltage applied
- BType of target material
- CTemperature of the room
- DSize of the tube
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Answer: B
Characteristic X-rays have energies that depend on the target element.
Question 5
X-rays are produced in a:
- AHigh vacuum tube
- BOpen air chamber
- CWater tank
- DMagnetic box
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Answer: A
An X-ray tube is a high vacuum tube.
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