Physics Atomic Spectra Test Online Preparation Mcqs

Physics Atomic Spectra Test Online Preparation Mcqs With Answers Start Below

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Question 1 of 15

1. If electron and proton have the same wavelength then they have same

A. Velocity

B. All of above

C. Momentum

D. Energy

Question 1 of 15

Question 2 of 15

2. Maximum frequency in the spectrum from X-ray tube is directly proportional to the ______.

A. The kinetic energy of the incident electron i.e. the potential difference through which they are accelerated

B. Number of incident electron i.e. filament current

C. All of above are correct

D. The soft target which can easily emit electrons

Question 2 of 15

Question 3 of 15

3. The characteristics X-rays spectrum is due to

A. The absorption of γ radiation by the target metal

B. The illumination of the target metal by ultra-violet radiation

C. The bombardment of the target by protons

D. The bombardment of the target by electrons

Question 3 of 15

Question 4 of 15

4. Reverse process of photoelectric effect is

A. Pair production

B. Compton effect

C. Annihilation of matter

D. x-rays production

Question 4 of 15

Question 5 of 15

5. The radiations emitted from hydrogen filled discharged tube show

A. Absorption spectrum

B. Continuous spectrum

C. Band spectrum

D. Line spectrum

Question 5 of 15

Question 6 of 15

6. In an X-ray tube, electrons each of charge e are accelerated through V potential difference allowed to hit a metal target. The wavelength of the X-rays emitted is _______.

A. Impossible to predict

B. hc/eV

C. he/Vc

D. eV/h

Question 6 of 15

Question 7 of 15

7. Band spectrum is produced by:

A. H

B. He

C. Na

D. H2

Question 7 of 15

Question 8 of 15

8. UV radiation can be produced by

A. Electron excitation in the gas

B. Ionization of atoms

C. All the above

D. Heating the filament

Question 8 of 15

Question 9 of 15

9. The penetrating power of x-rays depends on their

A. Applied voltage

B. Source

C. All of the above

D. Filament current

Question 9 of 15

Question 10 of 15

10. The minimum wavelength of X-rays produced by the bombardment of electrons on the screen of a television set where the acceleration potential is 2.0K V, will be

A. 9.1x10-18m

B. 4x10-10m

C. 3.11x10-10m

D. 6.2x10-10m

Question 10 of 15

Question 11 of 15

11. A Balmer line is emitted when the electron in a hydrogen atom jumps from

A. The first orbit to a higher orbit

B. The second orbit to a higher orbit

C. A higher orbit to the first orbit

D. A higher orbit to the second orbit

Question 11 of 15

Question 12 of 15

12. X-rays are _________

A. high energy electrons

B. radio isotopes

C. of unknown nature

D. high energy photons

Question 12 of 15

Question 13 of 15

13. Excited atoms return to their ground state in ________.

A. 10-9s

B. 10-8s

C. 10-10s

D. 10-6s

Question 13 of 15

Question 14 of 15

14. Wave-like characteristic of electron is demonstrated by

A. Photoelectric effect

B. Diffraction by crystalline solids

C. Line spectrum of atoms

D. Production of x-rays

Question 14 of 15

Question 15 of 15

15. Radiation produced from TV picture tube is

A. Infrared

B. Far infrared

C. γ-rays

D. X-rays

Question 15 of 15

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Physics Atomic Spectra Test Online Preparation Mcqs

Physics Atomic Spectra Test Online Preparation Mcqs With Answers Start Below

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