X-Ray Physics Quiz

What is the primary characteristic of x-rays compared to other electromagnetic waves?

• They have lower energies than visible light

• They have much higher energies than visible light

• They have the same energy as visible light

• They are mechanical waves

In order to generate x-rays, electrons must be accelerated to extremely high:

• Velocities

• Masses

• Temperatures

• Pressures

The formula for calculating kinetic energy is:

• KE=mv

• KE=1/2mv^2

• KE=m^2v

• KE=v^2/m

In the kinetic energy formula, which factor has a greater impact on energy?

• Mass

• Velocity

• Time

• Distance

Electrons in an x-ray machine are accelerated to speeds between:

• 10% and 20% of the speed of light

• 30% and 40% of the speed of light

• 50% and 80% of the speed of light1

• 90% and 100% of the speed of light

How far do electrons travel from the filament to the anode disc in an x-ray tube?

• Less than 1 inch

• About 5 inches

• 10 inches

• Over 12 inches1

If an electron is traveling at 56% of the speed of light, what is its velocity?

• 1.68×106 m/s1.68 \times 10^6 \, \text{m/s}1.68×106m/s

• 3.0×107 m/s3.0 \times 10^7 \, \text{m/s}3.0×107m/s
  
  

• 1.68×108 m/s1.68 \times 10^8 \, \text{m/s}1.68×108m/s

• 3.0×108 m/s3.0 \times 10^8 \, \text{m/s}3.0×108m/s

What is the mass of a single electron?

• 9.1×10⁻³¹ kg

• 1.6×10⁻²⁷ kg

• 1.0×10⁻¹⁸ kg

• 9.1×10⁻¹⁴ kg

Using the calculated kinetic energy of 1.284×10⁻¹⁴ J, what is the energy of the x-ray produced?

• 60 kV

• 70 kV

• 80 kV

• 90 kV

According to Einstein’s theory of relativity, the calculated energy of the x-ray would be closer to:

• 80 kV

• 82 kV

• 84 kV

• 90 kV