ECAT Pre Engineering Physics Chapter 21 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 21 Nuclear Physics

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

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Physics ECAT Pre Engineering Chapter 21 Nuclear Physics

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Question # 1

The figure 1.007276μ shows the mass of an:

Question # 2

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

Question # 3

The half life of uranium-238 is

Question # 4

The range ofβ-particle in air is greater than that ofα-particle by

Question # 5

β-particles are easily deflected by collisions than heavy

Question # 6

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

Question # 7

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

Question # 8

The emission of radiations take place in elements, having charge number greater than

Question # 9

When radioactive nucleus emits aβ-particle, the proton-neutron ratio

Question # 10

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

Question # 11

Radioactivity was discovered by

Question # 12

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

Question # 13

U-238 present in the natural uranium is about:

Question # 14

Nucleon means:

Question # 15

The rate of decay of a radioactive substance

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains
A. 3 more neutrons
B. 3 more electrons
C. 3 more protons
D. 3 more ions
2 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
3 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
4 The nucleus left after the emission of some radiation is called:
A. Parent nucleus
B. Daughter necleus
C. Mother necleus
D. Any of these
5 Maric Curie and Pieree Curie discovered two new radioactive elements, which are called
A. polonium uranium
B. uranium and radium
C. polonium and radium
D. none of these
6 The unit of decay constant is:
A. Second
B. Metre
C. Hour
D. Year
7 How much time, theα-particle more massive than an electron
A. 600
B. 7000
C. 5000
D. 15000
8 Which of the following material has smaller has life
A. uranium
B. polonium
C. radium
D. radian
9 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
10 Radiation detector are used to
A. measure intensity of radiation
B. measure energy of radiation
C. difference between different types of radiation
D. all the above

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