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Physics

Chapter 1 - Electric Current, Ohms Law and Kirchhoffs Laws

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Chapter 2 - Magnetic Effects of Electric Current and Measuring Instruments

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Chapter 3 - Electromagnetic Induction and AC Dynamo and Transformer

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Chapter 4 - Alternating Current AC Circuits

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Chapter 5 - Dual Nature of Wave and Particle

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Chapter 6 - Atomic Spectra and X-Rays

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Chapter 7 - Lasers and Principles

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Chapter 8 - Modern Electronics and Semiconductors

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Quiz

Lesson 1: Hydrogen Atomic Emission Spectrum and Production of X-Rays — Picture questions (exam style)

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  • Questions count: 7
  • Passing grade: 60%
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1.
An X-ray tube runs at 40 kV (spectrum shown). The voltage is changed to 80 kV. Which option is correct?
An X-ray tube runs at 40 kV (spectrum shown). The voltage is changed to 80 kV. Which option is correct?
shortest wavelength × 1/2, characteristic (Kα) wavelengths unchanged
shortest wavelength × 2, characteristic wavelengths decrease
shortest wavelength × 1/4, characteristic wavelengths decrease
shortest wavelength × 1/4, characteristic (Kα) wavelengths unchanged
2.
An X-ray tube (50.0 kV, 5.00 mA) converts 2% of its input to X-rays. At what rate is heat produced in the target?
An X-ray tube (50.0 kV, 5.00 mA) converts 2% of its input to X-rays. At what rate is heat produced in the target?
245 W
255 W
5.00 W
200 W
3.
An X-ray tube runs at 40 kV (spectrum shown). The voltage is changed to 20 kV. Which option is correct?
An X-ray tube runs at 40 kV (spectrum shown). The voltage is changed to 20 kV. Which option is correct?
shortest wavelength × 1/2, characteristic wavelengths decrease
shortest wavelength × 1, characteristic (Kα) wavelengths unchanged
shortest wavelength × 1, characteristic wavelengths increase
shortest wavelength × 2, characteristic (Kα) wavelengths unchanged
4.
An X-ray tube runs at 30 kV (spectrum shown). The voltage is changed to 15 kV. Which option is correct?
An X-ray tube runs at 30 kV (spectrum shown). The voltage is changed to 15 kV. Which option is correct?
shortest wavelength × 4, characteristic wavelengths increase
shortest wavelength × 2, characteristic wavelengths increase
shortest wavelength × 2, characteristic (Kα) wavelengths unchanged
shortest wavelength × 1, characteristic wavelengths increase
5.
An X-ray tube runs at 30 kV (spectrum shown). The voltage is changed to 60 kV. Which option is correct?
An X-ray tube runs at 30 kV (spectrum shown). The voltage is changed to 60 kV. Which option is correct?
shortest wavelength × 2, characteristic (Kα) wavelengths unchanged
shortest wavelength × 1/2, characteristic wavelengths increase
shortest wavelength × 1, characteristic (Kα) wavelengths unchanged
shortest wavelength × 1/2, characteristic (Kα) wavelengths unchanged
6.
An X-ray tube runs at 80 kV (spectrum shown). The voltage is changed to 40 kV. Which option is correct?
An X-ray tube runs at 80 kV (spectrum shown). The voltage is changed to 40 kV. Which option is correct?
shortest wavelength × 2, characteristic (Kα) wavelengths unchanged
shortest wavelength × 2, characteristic wavelengths increase
shortest wavelength × 4, characteristic wavelengths increase
shortest wavelength × 1/2, characteristic (Kα) wavelengths unchanged
7.
An X-ray tube runs at 50 kV (spectrum shown). The voltage is changed to 100 kV. Which option is correct?
An X-ray tube runs at 50 kV (spectrum shown). The voltage is changed to 100 kV. Which option is correct?
shortest wavelength × 1/2, characteristic wavelengths decrease
shortest wavelength × 1/2, characteristic wavelengths increase
shortest wavelength × 1/2, characteristic (Kα) wavelengths unchanged
shortest wavelength × 1, characteristic (Kα) wavelengths unchanged
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