ECAT Pre Engineering Physics Chapter 20 MCQ Test With Answer

Top Scorers Of Physics ECAT Pre Engineering 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	Photons must have energy equal to	A. ev B. En C. hf D. None of these
3	The photocopying process is called:	A. Geography B. Sonography C. Xerography D. Zerography
4	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
5	By CAT scans, we can detect the density difference of the order of:	A. 1% B. 20% C. 30% D. 50%
6	CT scanning is the abbreviated name of	A. Computed Technology B. Computed Technique C. Computed Technology D. Computerized Technique
7	If the distance between two charges is doubled,the force between them will become:	A. Double B. Half C. One third D. One fourth
8	The spectrum emitted from hydrogen filled discharge tube is:	A. Line spectrum B. Discrete spectrum C. And spectrum D. Absorption spectrum
9	An compared to solid matter, a crack or an air bubble allows:	A. Great amount of X-rays to pass B. Smallast amount of X-rays to pass C. Very samall amount of X-rays to pass D. Any of these
10	Graph of Black body radiation is example of	A. Band spectra B. Continuo's spectra C. Line spectra D. All