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

In radioactive decay, the new element which is formed due to the disintegration of original element is called

Question # 2

Proton was discovered by Rutherford in

Question # 3

After alpha decay the atomic number of the atom

Question # 4

The number of protons inside a nucleus is called

Question # 5

The mass of the nucleus is always less than the total man of the protons and neutron that make up the nucleus. The difference of the two masses is called

Question # 6

Radioactivity

Question # 7

Which of these is not a radiation detector

Question # 8

The number of all the protons and neutrons in a nucleus is known as

Question # 9

In radio-active decay, the original element which disintegrate to another element is called

Question # 10

Gamma rays consist of steam of

Question # 11

Mass of proton is

Question # 12

The counter, which also provides the power to the G.M. tube is called:

Question # 13

γ-rays behave like a particle because they explain the

Question # 14

Heavy water is made of one oxygen atom and two atoms of:

Question # 15

1 amu is equal to

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The unit of decay constant is
A. sex
B. sec2
C. sec-1
D. sec-2
2 Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called
A. deuteron
B. deterium
C. protium
D. tritium
3 Alfa , beta and gamma rays are emitted from a radio-active substance
A. spontaneously
B. when it is heated
C. when it is exposed to light
D. When it interacts with the other particle
4 Three quarks make:
A. An electron
B. A meson
C. A baryon
D. A photon
5 Mass of neutron is
A. 1.67 x 10-31kg
B. 1.67 x 10-27kg
C. 9.1 x 10-31kg
D. 1.67 x 10-19kg
6 Neutron was suggested to be in the nucleus by:
A. Rutherford in 1920
B. Bohar in 1913
C. Dirac in 1928
D. Anderson in 1932
7 For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is
A. A - Z
B. A
C. Z
D. A + Z
8 Referring to the above figure, we can say that of all the elements, the most stable element is
A. Phosphours
B. Iron
C. uranium
D. Lithium
9 Binding energy per nucleus is
A. greater for heavy nucleus
B. least for heavy nucleus
C. greatest for light nuclei
D. decreases for medium weight niclei
10 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

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