Medical Imaging OCR A

Medical Imaging OCR A

12th Grade

15 Qs

quiz-placeholder

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Medical Imaging OCR A

Medical Imaging OCR A

Assessment

Quiz

Physics

12th Grade

Easy

Created by

Samuel Pullen

Used 3+ times

FREE Resource

15 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the process called when radiation is given off by charged particles due to their acceleration?

Radioactive decay

Bremsstrahlung

Nuclear fission

Thermionic emission

Answer explanation

The process of radiation emission by charged particles due to their acceleration is called Bremsstrahlung. This occurs when charged particles, like electrons, are deflected by electric fields, resulting in the release of energy in the form of radiation.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the main reason for using a vacuum tube in X-ray production?

To increase the speed of X-rays

To prevent electron collisions with air molecules

To cool the anode

To emit gamma rays

Answer explanation

The main reason for using a vacuum tube in X-ray production is to prevent electron collisions with air molecules, which allows for the efficient generation of X-rays without interference from air.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens to X-rays as they ionise matter?

They gain energy

They lose energy

They remain unchanged

They become visible light

Answer explanation

As X-rays ionise matter, they interact with atoms, causing the ejection of electrons. This process results in a loss of energy for the X-rays, making 'They lose energy' the correct choice.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the role of photons in X-ray production?

They absorb energy

They emit radiation

They have no role

They decrease intensity

Answer explanation

Photons play a crucial role in X-ray production by emitting radiation when high-energy electrons collide with a target material. This emission of radiation is what generates X-rays, making 'They emit radiation' the correct choice.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the unit of intensity (I) for an X-ray beam?

W/m

W/m²

W/m³

W

Answer explanation

The intensity (I) of an X-ray beam is measured in watts per square meter (W/m²), which represents power per unit area. This makes W/m² the correct choice, as it quantifies how much energy is delivered over a specific area.

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens to a photographic film if it is in the direct path of X-rays?

It becomes transparent

It remains unchanged

It is blackened less

It is blackened more

Answer explanation

Photographic film is sensitive to radiation, including X-rays. When exposed to X-rays, the film's emulsion is affected, leading to increased blackening. Therefore, the correct answer is that it is blackened more.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If the beam intensity halves in 1 cm of bone, what will it be in 3 cm?

One-fourth

One-eighth

One-half

One-sixteenth

Answer explanation

If the intensity halves every 1 cm, after 3 cm it will halve three times: 1/2 (1 cm) -> 1/4 (2 cm) -> 1/8 (3 cm). Thus, the intensity will be one-eighth.

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