ECAT Pre Engineering Physics Chapter 20 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 20 Atomic Spectra

Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 20 Atomic Spectra

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Physics ECAT Pre Engineering Chapter 20 Atomic Spectra

00:00
Question # 1

Laser is a beam of:

Question # 2

The electric field lines start from:

Question # 3

Energy required by an electron revolving in certain orbit to jump to an excited state is called:

Question # 4

Graph of Black body radiation is example of

Question # 5

We can excite an atom by

Question # 6

The process of formation of spectrum is called:

Question # 7

Coulomb multiplied by volt by volt gives the unit called:

Question # 8

The inkjet printer eject a thin stream of:

Question # 9

The spectrum emitted from hydrogen filled discharge tube is:

Question # 10

X-rays can penetrate in a solid matte through a distance of several:

Question # 11

The minimum wavelength of X-rays produced of 1KV potential difference is applied across the anode and cathode of the tube is

Question # 12

Selenium is:

Question # 13

By CAT scans, we can detect the density difference of the order of:

Question # 14

Consider a photon of continuous X-ray and a photon of characteristics X-ray of same wavelength. Which of the following is/are different for the two photons

Question # 15

X-rays produced in a tube operating at 105V. The speed of X-rays produced is

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ECAT Physics Chapter 20 Important MCQ's

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 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
3 The life time of metastable state is equal to
A. Life time of excited state
B. Greater than by excited state
C. Zero
D. Less than by excited state
4 Gaussian surface is always:
A. Rectangular
B. Spherical
C. Cylinder
D. Box shape
5 The inkjet printer eject a thin stream of:
A. Water
B. Oil
C. Ink
D. Any above
6 The photocopying process is called:
A. Geography
B. Sonography
C. Xerography
D. Zerography
7 An electron of the hydrogen atom in the second orbit is called its:
A. Ground state
B. Excited state
C. Ionized state
D. Any of these
8 The shell closer to the nucleus is called:
A. N shell
B.
L shell
C. K shell
D. M shell
9 Balmer series was identified in:
A. 1685
B. 1785
C. 1885
D. 1985
10 If the distance between two charges is doubled,the force between them will become:
A. Double
B. Half
C. One third
D. One fourth

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  • Salmankhan

    Salmankhan

    01 Feb 2018

    Some mcqs having wrong answers.

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