20th Chapter

ICS Part 2 Physics Chapter 20 Online Test MCQ's

2nd Year Physics Chapter 20 Online MCQ Test for 12th Class Physics Chapter 20 (Atomic Spectra)

ICS Part 2 Physics
Chapter 20 Test

Start Chapter 20 Test

2nd Year Physics Chapter 20 Online MCQ Test for 12th Class Physics Chapter 20 (Atomic Spectra)

Sr. # Questions Answers Choice
1 X-rays were discovered by
  • A. Curie
  • B. Henry Becquerel
  • C. Rontgen
  • D. None of these
2 The first spectral lines were discovered in 1885, were
  • A. Paschen series
  • B. Balmer series 
  • C. Pfund series
  • D. Bracket series
3 Bremsstrahlung radiation are examples of
  • A. Atomic spectra
  • B. Molecular spectra
  • C. Continuous spectra
  • D. Discrete spectra
4 Charge on positron is:
  • A. Negative 
  • B. Positive
  • C. Netural
  • D. None of these
5 If 13.6 eV energy is required to ionize the hydrogen atom, then the required energy to remove an electron from n=2 is:
  • A. 10.2 eV
  • B. 0 eV
  • C. 3.4 eV
  • D. 6.8 eV
6 Kx -Xrays are produced due to transition of electron from.
  • A. K to L shell
  • B. L to K shell
  • C. M to K shell
  • D. M to L shell
7 Production of x rays is reverse process of
  • A. Photo electric effect
  • B. Compton effect
  • C. An nihilation
  • D. Pair production
8 1 rad =
  • A. 0.001Gy
  • B. 0.01Gy
  • C. 0.1Gy
  • D. 1.01Gy
9 We can find from de Broglie formula
  • A. Wavelength
  • B. Amplitude
  • C. Speed of wave
  • D. Frequency of wave
10 Which is not true for X rays
  • A. X rays are not defected by electric field
  • B. X rays are polarized
  • C. X rays consist of electromagnetic waves
  • D. X rays can be diffracted by grating

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Awais Farooq

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