ECAT Pre Computer Science Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

Try The MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

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ECAT Physics Chapter 21 Nuclear Physics

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Question # 1

Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called

Question # 2

For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is

Question # 3

How many isotopes of helium are present?

Question # 4

Mass of proton is

Question # 5

Three quarks make:

Question # 6

The unit of decay constant is:

Question # 7

The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains

Question # 8

The diameter of an atom is of the order

Question # 9

Which of the following material has longer half life

Question # 10

Nuclei that have the same charge number but different mass number are called

Question # 11

The nuclei of an element having the same charge number but different mass numbers are called:

Question # 12

The chemical properties of an element depends upon the number of

Question # 13

The time required for a radioactive material to decrease in active by one half is called

Question # 14

Radiation detector are used to

Question # 15

Rate of decay is actually described by.

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 When certain nucleus emits anα particle, its mass number:
A. Increases by one
B. Decreases by one
C. Remain same
D. Decreases by four
2 For an atom having atomic number Z and atomic weight A, the number of electron in an atoms
A. A - Z
B. A + Z
C. Z
D. A
3 Rate of decay is actually described by.
A. Half line
B. Decay constant
C. Mean life
D. Total life
4 The nucleus/nuclei of hydrogen is/are:
A. Proton
B. Deuteron
C. Triton
D. All of these
5 The energy acquired by a mass of 1g moving with the speed of light is
A. 3 x 108J
B. 9 x 1013J
C. 3 x 1013J
D. 9 x 1016J
6 Which of these is not a radiation detector
A. Wilson cloud chamber
B. cyclotron acceleration
C. Geiger Miller counter
D. solid state detector
7 The nucleus left after the emission of some radiation is called:
A. Parent nucleus
B. Daughter necleus
C. Mother necleus
D. Any of these
8 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
9 Gamma rays consist of steam of
A. electron
B. proton
C. photons
D. all of these
10 In radioactive decay, the new element which is formed due to the disintegration of original element is called
A. element
B. daughter element
C. parent element
D. none of these

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