Worksheetsx rays
Total questions: 17
Worksheet time: 13mins
x rays are emitted from
cathode
anode
filament
focusing cup
Quality of x rays depend on
Current
Voltage across filament
Voltage across anode and cathode
pressure inside tube
Which of these is NOT true about the x-ray tube for production of x-ray?
a vacuumed glass tube is used to prevent electron from hitting the air molecules.
the cathode consists of heated filament with high ionization energy.
cooling system is required at the anode metal target in order to prevent the metal from melting
the metal target of anode should be metal with high melting point.
Rearrange these statements to describe the production of x-ray:
I. The high speed electrons rapidly decelerated on the impact, and x-rays are emitted.
II. The high voltage current supply heat the filament cathode (to emit electrons at high acceleration).
III. Electrons emitted are accelerated towards a metal target.
I, II, III
II, III, I
II, III, I
II, I, III
What is a cathode ray?
Group of protons
An X-Ray
Fine beam of electrons
An image
Who invented the X-Ray?
Coolidge
Wilhelm Roentgen
George Eastman
Crooks
What particles are inside an atom?
Protons and Radiation
Protons and Calcium
Protons and Neutrons
Protons and Electrons
What are X-Rays?
Electricity
Packet of energy
Light
Electrons
Select the properties of the Stationary anode ...
Allows heat conduction away from the target
Mounted on a molybdenum rod
Anode is a disk with an angled edge
Tungsten target embedded in copper
Rotated by electric motors
When a ___ diffrence is applied to the tube, ___ hit the anode target at high ___ producing the x-rays.
(a)
As the cathode filament ___ up a cloud of free ___ forms around the wire.
This process is called ___ ___
(a)
What is the main difference between X-rays and Gamma rays?
X-rays have higher energy than Gamma rays
X-rays have lower energy than Gamma rays
X-rays are semi-transparent, while Gamma rays are not
X-rays can make images of organs, while Gamma rays cannot
Which material is commonly used for the anode in x-ray tubes?
Copper
Aluminum
Tungsten
Lead
The function of the focusing cup in the cathode is
To support the anode
To produce x-rays
To focus the electron stream
To dissipate heat
Which type of anode is most commonly used in modern radiography equipment?
Rotating anode
Dual-focus anode
Fixed anode
Stationary anode
What is the purpose of the line-focus principle?
To increase the size of the focal spot
To decrease the effective focal spot size
To enhance radiation protection
To improve electrical insulation
What is the purpose of the oil surrounding the glass envelope?
To cool the anode
To support the cathode
To enhance x-ray production
To provide electrical insulation
