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

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

Question # 2

Pair production take place when energy ofγ-rays photon is

Question # 3

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 # 4

Radioactivity was discovered by

Question # 5

Maric Curie and Pieree Curie discovered two new radioactive elements, which are called

Question # 6

When thorium nucleus emits aβ-particle, the daughter nucleus is called:

Question # 7

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

Question # 8

When certain nucleus emits aβ-particles, is mass number:

Question # 9

Which of the following material has smaller has life

Question # 10

According to Rutherford atomic model, the positive charge in an atom

Question # 11

The distance travelled byα-particle in a medium before coming to rest, is called

Question # 12

Charge on proton is

Question # 13

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

Question # 14

γ-rays behave like a particle because they explain the

Question # 15

When a charged particle passes through matter, it produces ionization, this effect is used in

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 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
2 Which of these is not a radiation detector
A. Wilson cloud chamber
B. cyclotron acceleration
C. Geiger Miller counter
D. solid state detector
3 Mass of proton is of order of
A. 10-31gm
B. 10-27kg
C. 10-24gm
D. 10+27kg
4 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
A. nuclear fission
B. nuclear fusion
C. man defect
D. radioactivity
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 Nucleus of a hydrogen atom may contain:
A. One neutron only
B. Two protons and one neutron
C. Two protons and two neutrons
D. Aany of above
7 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
8 Neutron was disvovered by:
A. Rutherford in 1920
B. Chadwick in 1922
C. Bohr in 1913
D. Compton in 1927
9 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
10 The figure 1.007276μ shows the mass of an:
A. Atom
B. Positron
C. Electron
D. Neutron

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