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

The amount of energy equivalent to 1 a.m.u is

Question # 2

For an atom having atomic number Z and atomic weight A, the number of electron in an atoms

Question # 3

Neutrons are

Question # 4

The unit of decay constant is:

Question # 5

How many isotopes of helium are present?

Question # 6

Which are not the elementary particles?

Question # 7

The chemical properties of all the isotopes of an elements are

Question # 8

A particle having the mass of electron and charge of a proton is called a

Question # 9

During the nuclear changes, the law/s of conservation that hold/s are that of:

Question # 10

The range of particle depends upon the factor

Question # 11

Curie is a unit of

Question # 12

Radium was discovered by:

Question # 13

Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:

Question # 14

Radiation detector are used to

Question # 15

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 Curie is a unit of
A. reluctance
B. resistivity
C. binding energy
D. radioactivity
4 When a charged particle passes through matter, it produces ionization, this effect is used in
A. fission reaction
B. reactor
C. radiation detector
D. fusion reaction
5 The missing mass which is converted to energy in the formation of nucleus, is called
A. packing fraction
B. mass defect
C. binding energy
D. none of these
6 The reciprocal of decay constant λ of a radioactive material is:
A. Frequency
B. Half life
C. Year
D. Mean life
7 Proton was discovered by Rutherford in
A. 1915
B. 1906
C. 1910
D. 1920
8 Different radioactive material have
A. same half lives
B. different half lives
C. same mean lives
D. same total lives
9 When a nucleus emits an alpha particle, it atomic mass decreased by
A. 2
B. 1
C. 4
D. 3
10 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

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