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

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Question # 1

Lyman series in the spectrum of hydrogen exists in the :

Question # 2

A metastable stae:

Question # 3

An electron of the hydrogen atom in the second orbit is called its:

Question # 4

Spectrum represents the number of component colours present in certain light in terms of:

Question # 5

Balmer series lies in that region of electromagnetic wave spectrum which is called:

Question # 6

The inkjet printer eject a thin stream of:

Question # 7

Static electricity is produced by the transfer of:

Question # 8

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

Question # 9

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

Question # 10

The first series which was identified in the spectrum of hydrogen is called:

Question # 11

The photocopying process is called:

Question # 12

Coulomb multiplied by volt by volt gives the unit called:

Question # 13

The spectrum emitted from hydrogen filled discharge tube is:

Question # 14

The first shell near the neucles is

Question # 15

Selenium is:

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 X-rays produced in a tube operating at 105V. The speed of X-rays produced is
A. 3 x 108m/s
B. 3.1 x 108m/s
C. 2.8 x 108m/s
D. 1.88 x 108m/s
4 If the distance between two charges is doubled,the force between them will become:
A. Double
B. Half
C. One third
D. One fourth
5 The first series which was identified in the spectrum of hydrogen is called:
A. Lyman series
B. Balmer series
C. Paschen series
D. Brackett series
6 Balmer series lies in that region of electromagnetic wave spectrum which is called:
A. Visible region
B. Invisible region
C. Infra-red region
D. ultraviolet region
7 CT scanning is the abbreviated name of
A. Computed Technology
B. Computed Technique
C. Computed Technology
D. Computerized Technique
8 The process of formation of spectrum is called:
A. Interference
B. Spectroscopy
C. Dispersion
D. Reflection
9 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
10 Coulomb multiplied by volt by volt gives the unit called:
A. farad
B. Ohm
C. Second
D. joule

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