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 process of formation of spectrum is called:	A. Interference B. Spectroscopy C. Dispersion D. Reflection
2	If the distance between two charges is doubled,the force between them will become:	A. Double B. Half C. One third D. One fourth
3	CT scanning is the abbreviated name of	A. Computed Technology B. Computed Technique C. Computed Technology D. Computerized Technique
4	Static electricity is produced by the transfer of:	A. Electrons B. Protons C. One fluid D. Two fluid
5	The holes created in the L and M shells are occupied by transitions of:	A. Electrons from lower states B. Electrons from higher state C. Positrons from higher states D. Electrons from K shell
6	In flesh, light element like carbon, hydrogen and oxygen predominate. Three elements allows ______ amount of incident X-ray to pass through them	A. Small B. Greater C. Equal D. Sometimes
7	A metastable stae:	A. Is an excited state B. Is that in which excited electron is stable C. Is that in which excited electron is usually unstable D. Means a time interval of 10^-8second
8	The He-Ne laser discharge tube is filled with:	A. 85% He B. 15% He C. 50% He D. 60% He
9	The transitions of electrons in the hydrogen atom result in the emission of spectral lies in the:	A. Ultra red region B. Visible region C. Ultraviolet region D. Any of these
10	Tick the series which lies in the visible region:	A. Lyman series B. Balmer series C. Paschen series D. Brackett series