ECAT Pre Computer Science Chapter 20 MCQ Test With Answer

Top Scorers Of ECAT Physics Chapter 20 Atomic Spectra MCQ`s Test

Sr.#	Question	Answer
1	The range of wavelengths of colurs in the visible colours is	A. 140 nm to 456 nm B. 10 nm to 56 nm C. 410 nm to 656 nm D. 910 nm to 956 nm
2	Ultraviolet region lies in ______ series	A. Layman B. Balmer C. P fund D. B racket
3	Photons must have energy equal to	A. ev B. En C. hf D. None of these
4	Energy required by an electron revolving in certain orbit to jump to an excited state is called:	A. Ionization energy B. Ionization potential C. Excitation energy D. Excitation potential
5	By CAT scans, we can detect the density difference of the order of:	A. 1% B. 20% C. 30% D. 50%
6	X-rays can penetrate in a solid matte through a distance of several:	A. Kilo metres B. Metres C. Centimeters D. A few angstroms
7	Graph of Black body radiation is example of	A. Band spectra B. Continuo's spectra C. Line spectra D. All
8	CT scanning is the abbreviated name of	A. Computed Technology B. Computed Technique C. Computed Technology D. Computerized Technique
9	Tick the series which lies in the visible region:	A. Lyman series B. Balmer series C. Paschen series D. Brackett series
10	Gaussian surface is always:	A. Rectangular B. Spherical C. Cylinder D. Box shape