ECAT Pre Computer Science Chapter 20 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 20 Atomic Spectra

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

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ECAT Physics Chapter 20 Atomic Spectra

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Question # 1

Graph of Black body radiation is example of

Question # 2

The first shell near the neucles is

Question # 3

Coulomb multiplied by volt by volt gives the unit called:

Question # 4

Laser is a beam of:

Question # 5

We can excite an atom by

Question # 6

Balmer series was identified in:

Question # 7

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

Question # 8

The natural arrangement of colours in the spectrum of white light spectrum is

Question # 9

A metastable stae:

Question # 10

The life time of metastable state is equal to

Question # 11

The holes created in the L and M shells are occupied by transitions of:

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

X-ray are also known as

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 The electric field lines start from:
A. Positive charge
B. Negative charge
C. Either A and B
D. Neutron
2 The inkjet printer eject a thin stream of:
A. Water
B. Oil
C. Ink
D. Any above
3 Lyman series in the spectrum of hydrogen exists in the :
A. Infra-red region
B. Visible region
C. Ultraviolet region
D. Both(A) and (B)
4 The spectrum emitted from hydrogen filled discharge tube is:
A. Line spectrum
B. Discrete spectrum
C. And spectrum
D. Absorption spectrum
5 Tick the series which lies in the visible region:
A. Lyman series
B. Balmer series
C. Paschen series
D. Brackett series
6 By CAT scans, we can detect the density difference of the order of:
A. 1%
B. 20%
C. 30%
D. 50%
7 X-ray are also known as
A. Roentgen rays
B. Maxwell rays
C. Plank range
D. Einstein rays
8 The He-Ne laser discharge tube is filled with:
A. 85% He
B. 15% He
C. 50% He
D. 60% He
9 We can excite an atom by
A. Bombardment of particles
B. Radiating photons
C. Providing potential difference
D. All answer are true
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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